Question

mean of 46 items is 30. it was discovered that three items which should have been 33,38,39 were wrongly read as 25, 30, 35 respectively. the correct mean is
Options-
18, 16, 14, 22​

Answer 1

Answer:

the correct answer is 16

Answer 2

Given : mean of 46 items is 30.

it was discovered that three items which should have been 33,38,39 were wrongly read as 25, 30, 35 respectively.

To Find :  the correct mean

Solution:

mean of 46 items is 30.

Total = 46 * 30  = 1380

three items which should have been 33,38,39 were wrongly read as 25, 30, 35 respectively.

Hence correct sum  = 1380 + ( 33 + 38 + 39) - (25 + 30 + 35)

=  1380 + ( 110) - (90)

= 1380 + 20

= 1400

Corrected Men  =   1400/46  =  30.4347

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