Can someone help me with this question please.....

Question

asked Oct 7, 2021 39.5k views

1 Answer

Faizan · Answer 1 · 2021-10-11T14:02:54+0000

Answer:

y = 541

Explanation:

The mean is calculated as

mean =
(sum)/(count)

Mean of set A =
(281+268+225+290)/(4) =
(1064)/(4) = 266

ratio between means = 7 : 12, then

mean of set B =
(12)/(7) × 266 = 456 , thus

(392+512+413+422+y)/(5) = 456 ( multiply both sides by 5 )

1739 + y = 2280 ( subtract 1739 from both sides )

y = 541