Question

the mean of the height of 6 girls is 148.if the in individual height of five of them are 142,154,146,145,150 find the height of sixth girl

Answer 1

Given : Mean of 6 girls (M) = 148cm

Let us assume the height of the 6th girl to be H.

Mean (M) = Total sum of all the heights / Total number of girls

148 = 142 + 154 + 146 + 145 + 150 + H / 6

148 = 737 + H / 6

737 + H = 148 x 6 = 888

737 + H = 888

H = 888 - 737 = 151

So, the height of 6th girl is 151cm

Answer 2

Mean of 6 girls =148 cm

Sum of height of 6 girls=148×6

=888

Sum of height of 5 girls=142+154+146+150cm

=737cm

Height of sixth girls=888-737

=151cm

Hence, the height of sixth girls is 151cm