CSC Company Numerical Ability Ratio and Proportion

In a class, 3/5 of the students are girls and rest are boys. If 2/9 of the girls and 1/4 of the boys are absent, what part of the total number of students is present ?

A. 17/25 B. 18/49
C. 23/30 D. 23/36

Read Solution (Total 1)

ANS. C

Girls = 3/5, boys are 2/5
Absentees are (2/9)*(3/5) + (1/4)*(2/5) = 7/30
Present Students are 23/30
13 years agoHelpfull: Yes(5) No(3)

CSC Other Question

A father tells his son, "I was of your present age when you were born". If the father is 36 now, how old was the boy five years back ?

A. 13 B. 15
C. 17 D. 20 In a family, a couple has a son and a daughter. The age of the father is three times that of his daughter and the age of the son is half of that of his mother. The wife is 9 years younger to her husband and the brother is seven years older than his sister. What is the age of the mother ?

A. 40 years
B. 45 years
C. 50 years
D. 60 years