Question

Mean of 15 number is 10. If 3 is added in 1-10 number, then new mean is 12. State whether it is true or false with solution.​

Answer 1

Answer: The above statement is true.

Step-by-step explanation:

No. Of numbers = 15

Mean of these numbers = 10

Total of these numbers = 15 × 10 = 150

If 3 is added to each number in 1st Ten numbers, then:

The total is then increased by = 3 × 10 = 30

The new total of these numbers = 150 + 30 = 180

The new mean = New Total / No. Of Numbers

= 180 / 15

= 12

So, the new mean = 12

Hence, the above statement is true.

Answer 2

Answer:

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