Question

the mean of 100 numbers was 3 later on it was found 30 was misread as 130 correct mean​

Answer 1

Answer:

3 and halh will be the answer

Answer 2

Answer: 2

Step-by-step explanation:

• We know mean=$\frac{sum\ of\ observations}{Number\ of \ observations}$
• Sum of observations= mean*Number of observations

                                          = 3*100

                                          = 300

• It is given that 30 was misread as 130, so the sum of observations will decrease by (130-30)=100
• So, the sum of observations=300-100

                                                       =200

• New mean=$\frac{200}{100}$

                          =2

• Hence, the required mean is 2.

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