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a group of housewives with average age 30 years meet with another group of housewives with average age of 40 years.if the average age of the new group is 34 years,what is the ratio of number of housewives in the first group to the number of housewives in the second group?
(A)2:3 (B)3:5 (C)3:2 (D)3:4 (E)4:3
Read Solution (Total 2)
-
- 1ST GROUP TOTAL AGE=30X,WHERE X= NO. OF HOUSEWIVES
2ND GROUP TOTAL AGE=40Y,WHERE Y= NO. OF HOUSEWIVES
GIVEN:
(30X + 40Y)/(X+Y)=34
WHICH ON SOLVING GIVES
X:Y=3:2 - 13 years agoHelpfull: Yes(15) No(2)
- ans is C)3:2
let x in first group
y in second
now
x(30)+y(40)/x+y=34
so x:y=3:2 - 13 years agoHelpfull: Yes(6) No(2)
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