Question

please solve this question

Answer 1

Answer:

39.8

Step-by-step explanation:

mean = 40

sum of all 50 items = 40*50 = 2000

actual sum = 2000-(32+12)+(23+11)=1990

actual mean = 1990/50 = 39.8

Answer 2

Answer:

39.8

Step-by-step explanation:

Given, Mean of 50 items = 40.

∴ Mean = Sum/Total.

Sum of 50 items = Mean * Total

                           = 40 * 50

                           = 2000

Given that he wrongly taken as 32 and 12 instead of 23 and 11.

= 2000 + 23 + 11 - 32 - 12

= 1990

Therefore,

∴ Correct mean = 1990/50

                       = 39.8

Therefore, Correct Mean = 39.8

Hope it helps!