Question

Find the average of 10 items if the average of the first 6 items is 37 and the average of the rest 4 items is 42.​

Answer 1

Answer:

$average \: of \: 10 \: items =39.$

Step-by-step explanation:

$sum \: of \: first \: six \: items = 37 \times 6 \\ \\ = 222 \\ \\ sum \: of \: next \: four\: \: items = 42 \times 4 \\ \\ = 168. \\ \\ \\ average \: of \: 10 \: items = \frac{222 + 168}{10} \\ \\ = \frac{390}{10} \\ \\ = 39.$