Question

The average weight of first 11 persons among 12 persons is 95 kg. the weight of 12 th person is 33 kg more than the average weight of all the 12 persons. the weight of the 12 th person is

Answer 1

avg wt. of 11 person will be
let person be P1 , P2 , ... , P12
so,
P1+P2+P3+P4+......+P11/11=95
so,P1 +P2+P3+P4+.....+P11=95×11=1045----》(1)
now,
P1+P2+P3+P4+....+P11+P12/12 + 33 = P12
from (1)
1045 + P12/12 + 33 = P12
solve this eqn.
P12=131