Question

The average weight of 45 girls in a class is 53 kg, it was later found that the weight of two girls read 49 kg and 57 kg, compared to 45 kg and 52 kg, find the actual average weight of the class​

Answer 1

Answer:

[Answer:- Required actual average weight = 57.62 kg.]

Step-by-step explanation:

____________________________

Solution:- It is given that the average weight of a group of 53 girls was calculated as 58 kg. It was later discovered that the weight of one of the girls was read as 65 kg, whereas her actual weight was 45 kg.

Method 1:-

Actual weight of 53 girls

= 53×58+45−65

= 3074 + 45 - 65 = 3054 kg.

Therefore, Required actual average weight = 3054/53 = 57.62 kg.

____________________________

Method 2:-

Decrease in weight = 65 - 45 =20 kg

Therefore, Required actual average weight = (58−20/53) = 57.62 kg.

[Answer:- Required actual average weight = 57.62 kg.]

____________________________