The average 15

The average age of a group of four men whose ages are in the ratio of 2:3:4:5 is 42 years, what is the age of the eldest person of this group?

Correct answer:

d =  60

Step-by-step explanation:

a:b:c:d=2:3:4:5 5>4>3>2 => d>c>b>a  m=42  a=2x b=3x c=4x d=5x  m = 4a+b+c+d = 42x+3x+4x+5x  4m = 14x  x=144 m=144 42=144 42=14168=12  d=5 x=5 12=60



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