Question

The mean height of 8 students is 152 cm. Two more students of heights 143 cm and 156 cm join the group.new mean height is equal to
(a) 153
(b) 152.5
(c) 151.5
(d) 151
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Answer 1

Answer:

(C) 151.5

Step-by-step explanation:

152=Sum of all observation/8

152×8= x =>x=1216

Now 2 persons are added. So x=1216+143+156=1515

Now No. of observation is 10

So the mean =x/10

=1515/10

=151.5