TCS Company Numerical Ability Ratio and Proportion

Ratio of teenagers to adult is 30:1. If teenagers are increased by fifty and adults by 5, the ratio will change to 25:1. What is the number of adults at present?

Read Solution (Total 3)

(x+5)/(30x+50)= 1/25
x=15
no. of adults at present =20
9 years agoHelpfull: Yes(6) No(4)

(30x+50)/(x+5)=25/1
on cross multiply
30x+50 =25x +125
5x=75
x=15
so number of adults =15
9 years agoHelpfull: Yes(6) No(2)
num of adults at present : 15
8 years agoHelpfull: Yes(1) No(1)

TCS Other Question

A staircase contains 12 steps. We can climb it 1 or 2 steps. But 8th step contains a snake so we cant step on it. In how many ways can we the top? Please solve this question
The ratio of adults and teenagers is 1:30. if teenagers are increased by fifty and adults by 5 new ratio become 1:25. What is number of adults at present?