Question

Find the mean of 8, 12, 16, 22, 10 and 4. Find the resulting mean, if each of the observations, given above, be:  increased by 25%

Answer 1

New Mean  = Original   mean + 25% of original mean

⇒ New mean = 12 + 25% of 12

⇒ New mean = 12 +`25/100 xx 12`

⇒ New mean = 12 + `1/4 xx12`

⇒ New mean = 12 + 3 

⇒ New mean =  15