Question

The mean of 22 observations is 10. Two more observations are included and the new mean becomes 11.
The mean of two new observations is?
Options are,,,
A.19
B.20
C.21
D.22

Answer 1

Answer: 22

Step-by-step explanation:

Mean = Sum/Number

Sum = Mean * Number = 10 * 22 = 220

2 new observations added. Mean = 11, Number = 24

Sum = Mean * Number = 11 * 24 = 264

Sum of 2 new observations = 264 - 220 = 44

Mean of 2 new observations = sum/number = 44/2 = 22

ALTERNATE:

Had the new observations been 10 each, the mean wouldn't have changed.

Mean increased by '1'.

Sum of new = 10 + 10 + (1*24) = 44

Mean = 44/2 = 22

Answer 2

Hey mate❤️❤️

Option D is the right answer of your question

I hoe it helpfull

❣️❣️✌️✌️❣️❣️