The average weight of three men A B and C is 84 kg Another man D joins the group and the average now...........

Quantitative Aptitude (CDS) Average

The average weight of three men A, B, and C is 84 kg. Another man D joins the group and the average now becomes 80kg. if another man E, whose weight is 3kg more than that of D, replaces A then the average weight of B, C, D, and E becomes 78kg. the weight of A is?

80kg

78kg

79kg

70kg

छोटे Courses बड़े Results

Master Average

Prepare through Micro-courses

Try Now

Explanation:

A,B,C's average weight is 84kg
total weight=84(3)=252
when D joins the group average weight is 80kg=80×4=320
D weight is =320-252=68kg
E weight is=68+3=71 kg
B,C,D and E average weight is=78
sum of B,C,D and E weight is=4×78=312
B and C weight is=312-(68+71)
=312-139
=173
A,B and C weight is=252
A weight is=252-173
=79kg