Question

In a group of four friends, Ram and shyam have equal weight .The ratio of weight of shyam and Pooja is 2: 3 and the ratio of weights of Ram and Neenu is 1: 2. If the average weight is 55 kgs. How many of them have weight equal to or greater than 60 kgs.
A) 1
B) 2
C) 3
D) 4
E) Cannot be determined

Answer 1

B)

Ram and Shyam have equal weight let the way to be x

x\pooja =2\3

pooja \x =3\2...by invertendo

pooja = 3x\2

x\Neenu = 1\ 2

Neenu \x = 2\1..

Neenu =2x ...by invertendo

average =sum of observations upon number of observations

55 = x + x + 3x\2 + 2x upon 4

55=4x +3x\2 upon 4

55 = 8x + 3x \2 ÷4

55 =11x ÷ 2

440=11x

x=40

Ram equal to 40

Shyam equal to 40

Pooja =3× 40 \2 =60

Neenu = 2×40 = 80

therefore 2 people have weight equal to 60 or more than 60