Core stretch Fifteen scores were reported with mean 10.4, but scores 13 and 17 should have been omit

Question

Core stretch Fifteen scores were reported with mean 10.4, but scores 13 and 17 should have been omitted. Find the correct mean of the remaining 13 scores, correct to 3 significant figures.

Accepted Answer

$9.69$

Correcting a mean

Correcting a mean

Solution:

Solution locked