CMAT Maths Puzzle Numerical Ability Number System

In a class, 50 students play cricket, 20 students play football and 10 students play both cricket and football. How many students play at least one of these two games?
Option
(a) 10
(b) 50
(c) 80
(d) 60

Read Solution (Total 1)

ans option d)60
n(A U B)=n(A)+n(B)-n(A (^) B)

where, n(A U B)=? no. of students playing at least one of these two games

n(A)=50 cricket players
n(B)=20 football players
n(A (^) B)=50 both games players
n(A U B) = 50+20-10=60
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CMAT Other Question

A student is to answer 10 out of 13 questions in an examination such that he must choose exactly four from the first five questions. The number of choices available to him is
Option
(a) 140
(b) 196
(c) 280
(d) 346 In a factory’s total daily wages of 20 men, 30 women and 36 children is 78. The ratio of work done by a man, a woman and a child in a day is 3 : 2 : 1 respectively. What will be the total wages of 15 men, 21 women and 30 children for 18 weeks?
Option
(a) 7,371
(b) 9,585
(c) 6,956
(d) 5,000