Question

The average weight of 5 men is 70 kg. What should be
the weight of the next person if the average increases
to 80?
A. 80 kg
C. 120 kg

B.130 kg
D. 90 kg

Answer 1

Answer:

mental you don't now any think man. edit

Answer 2

Answer:

130kg

Step-by-step explanation:

$\frac{sum \: of \: the \: five \: men}{5} = 70$

sum of the mass of men = 70 × 5 = 350

let the weight of new men be = x

then,

$\frac{350 + x}{6} = 80$

350 + x = 80 × 6

x = 480 - 350

x = 130

the mass of new person= 130kg