Question

find the mean of class 1-3,3-5,5-7,7-9,9-11 and frequency 7,2,8,2,1​

Answer 1

they all r prime numbers so

so it will be 1÷3 that is 1.11

so like this u to do all this

and frequency

7+2×2 cause 9×2 answer is 18

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