Question

(b) The mean weight of seven people is 61kg. Another person joins the group and the
mean falls to 59kg. Calculate the weight of the eighth person.​

Answer 1

Answer:

The weight of the eighth person is 45

Step-by-step explanation:

Total weight of seven persons is 61×7 = 427kg

Total weight of eight persons is 59×8= 472kg

Therefore, the weight of the eighth person is 472 -427 = 45 kg