Question

find the mean and median of the first 20-two digit numbers. ​

Answer 1

Answer:

mean =0, 16 , 21

median all others

Step-by-step explanation:

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Answer 2

Answer: 20.5 and 20.5

Step-by-step explanation:

mean = ( sum of 11 to 30 )/20

sum of 11 to 30 = 20* 41/2 =410   (∵ sum of n numbers= n(a+l)/2 )

mean = 410/20 = 20.5

median = ( 10th term + 11th term)/2 = (20+21)/2 = 41/2 = 20.5