Ques:- In a class of 60 students, the number of boys and girls participating in the annual sports is in the ratio 3 : 2 respectively. The number of girls not participating in the sports is 5 more than the number of boys not participating in the sports. If the number of boys participating in the sports is 15, then how many girls are there in the class? (1) Data inadequate (2) 20 (3) 25 (4) 30 (5) None of these
Recent Answer : Added by Admin On 2020-05-17 12:03:57:
let no. of boys not participating be x
then the no. of girls not participating = x+5
no. of boys : girls participating = 3:2
given no.of boys participating = 15
therefore, the ratio is now 15:y(say)
then 3:2 = 15 : x
on solving 3/2 =15/y ie.., 3y =30 we get y =10
hence no. of girls participating =10
therefore total no of students paricipating = 15+10=25
total no of students in class =60 given
hence no. of students not participating = 60-25=35
therefore x+(x+5)=35
2x=30
x=15
therfore no of girls not participating =15+5=20
therefore total no of girls in class = no of girls
participating + no of girls not participating
=10+20
=30 is the answer
Ques:- A moves 3 kms east from his starting point . He then travels 5 kms north. From that point he moves 8 kms to the east. How far is A from his starting point?
Recent Answer : Added by usha On 2021-11-09 15:54:01:
16
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Ques:- Where you want to be in next 5 years
Recent Answer : Added by suvhash On 2022-08-14 16:32:13:
on the earth
Ques:- Two cars, 15 km apart one is turning at a speed of 50kmph other at 40kmph . How will it take to two cars meet.
Recent Answer : Added by Admin On 2020-05-17 11:59:19:
A is travelling at 50kmph, B is travelling at 40
kmph……..according to the formula
time taken to meet = distance between them
———————-
relative speed of two vehicles
so, time taken to meet= 15/(50-40)=15/10=3/2hrs
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Ques:- If a number is subtracted from its square we get 272. Find the number?
Recent Answer : Added by Lucky Sithole On 2022-03-09 16:37:45:
X×x-x=272
X^2-x-272=0
(X-16) or (x-17)
X=16 or x=17
17^2-17=272
Answer Is 17
Ques:- 30% apples out of 450 are rotten. How many apples are in good condition?
A. 180
B. 240
C. 315
D. 335
Recent Answer : Added by Venu On 2022-08-14 16:44:44:
450÷100×30=135
450-135=315
Ans: 315
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Ques:- 80% pass in english, 70%pass in maths , 10%fail in both , 144 pass in both . How many all appeared to the test?
Recent Answer : Added by Admin On 2020-05-17 12:01:09:
pass English =80%
fail=100-80=20%
pass Math = 70%
fail in Math=100-70=30%
fail in both=10%
total fail students= fail in Eng+fail in Math-common
= 20+30-10=40%
if 40% fail then 60% will pass
let total students=x
hence
60% 0f (total students)=144
60/100 of (x)= 144
x=(144×100)/60
X=240
total students=240
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Ques:- If second no is twice the first no and first no is thrice the third no.Their avg is 20.Find the greatest no?
Recent Answer : Added by Admin On 2020-05-17 12:01:46:
let the third no be x ,
then the first no is 3x ,
second no is 2*3x ie 6x
average is (3x+6x+x )/3 = 20
10x/3 = 20
x= 60/10 = 6
third no is 6 , second is 6x = 36, first no is 3x = 18
largest no is 36 i.e second no
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Recent Answer : Added by ANKUR SHARMA On 2022-09-02 17:03:04:
75/8 days
Ques:- 38649 – 1624 – 4483 = ?
A. 32425
B. 32452
C. 34522
D. 32542
Recent Answer : Added by narendra On 2022-09-18 09:02:21:
d
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Ques:- What is the present worth of Rs. 132 due in 2 years at 5% simple interest per annum?
Recent Answer : Added by WebApp Tester On 2022-04-02 06:59:18:
145.2
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Ques:- In a certain year, the number of girls who graduated from City High School was twice the number of boys. If 3/4 of the girls and 5/6 of the boys went to college immediately after graduation, what fraction of the graduates that year went to college immediately after graduation?
Recent Answer : Added by APIA ZAINAB On 2022-01-19 15:38:44:
4/5
Ques:- A queen had 3 rings in a jewel box. She had 3 daughter’s and one day the king said that the queen should give one ring to each of her daughter’s and she should also keep a ring in that jewel box . The queen did what the king said. How is this possible ?
Recent Answer : Added by Admin On 2020-05-17 12:04:18:
The queen gave two rings to two daughter’s and she kept the
third ring in her jewel box and she presented the ring to
her third daughter along with that jewel box.
Ques:- a man showed to a woman sitting in a park & told to his friend.she is the daughter of my grand mother only son. then what is the relation to him with her?
Recent Answer : Added by Priyadharshini Arumugam On 2020-12-21 15:24:15:
let no. of boys not participating be x
then the no. of girls not participating = x+5
no. of boys : girls participating = 3:2
given no.of boys participating = 15
therefore, the ratio is now 15:y(say)
then 3:2 = 15 : x
on solving 3/2 =15/y ie.., 3y =30 we get y =10
hence no. of girls participating =10
therefore total no of students paricipating = 15+10=25
total no of students in class =60 given
hence no. of students not participating = 60-25=35
therefore x+(x+5)=35
2x=30
x=15
therfore no of girls not participating =15+5=20
therefore total no of girls in class = no of girls
participating + no of girls not participating
=10+20
=30 is the answer