The mean weight of 8 girls in a group is 35 kg. The individual weights of seven of them are 35 kg, 28 kg, 43 kg, 25 kg, 33 kg, 51 kg and 22 kg. Find the weight of the eighth girls.
Answers
Answered by
0
Step-by-step explanation:
Weight of the 6th boy = x
Sum of observations = 51 + 45 + 49 + 46 + 44 + x = 235 + x
No: of observations = 6
Mean = sum of observations / no: of observations
48 = 235 + x /6
235 + x = 6 x 48
235 + x = 288
x = 288 - 235
x = 53
The weight of 6th boy = 53 kg
Answered by
10
Answer:
43 kg
Step-by-step explanation:
mean = (sum of all observations ) / ( total number of observations)
let weight of eighth girl be "x" kg
we know that mean weight is 35 kg
=> ( 35 + 28 + 43 + 25 + 33 + 51 + 22 + x ) / 8 = 35
=> ( 237 + x ) / 8 = 35
=> 237 + x = 35*8
=> 237 + x = 280
x = 280 - 237
=43 kg
Similar questions