RRB Group-D 3 Oct 2018-shift -2 Question 13

Question 13

The ratio of the average ages of three people and the other two in a group of five people is 9 : 7. If the difference of their averages is 12, then find out the average age of all 5 people?

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Comments

PROTIK ROY

3 years ago

Solution Math

chandu

2 years, 7 months ago

3*9x+2*7x=41x 9x-7x=2x=12=> x=6
41*6/5=49.2

Jasmin Jyotirekha Badi

2 years, 9 months ago

In the group of 5 people the ratio of average of the ages of first three and the last two is 9:7.if the average difference of their ages is 12 then what is the average age of the 5 people...? Please give me solution

DEVARAJ UMESH

2 years, 9 months ago

Explain

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