109
you can plus like this:
(19+1)+20+20+(1+1+18)+4+25
491
19. It is prime.
21+21+19+19=80
To find the mean of the numbers, first sum them up: 18 + 15 + 21 + 10 + 24 + 21 + 18 + 16 + 20 + 22 + 18 + 18 + 12 + 21 + 25 + 20 + 19 + 23 = 346. Then, divide this total by the number of values, which is 18. Thus, the mean is 346 ÷ 18 ≈ 19.22.
2,870,795,128,037,760 or approx 2.871*1015
16 + 16 + 16 + 17 + 18 + 18 + 18 + 19 + 19 + 20 + 20 + 20 + 21 = 238
Mean (12, 18, 19, 20, 21) = 18
491
32+14+20+18+16+31+21+16=168
21
20.37 is the mean.
19. It is prime.
21+21+19+19=80
To find the mean of the numbers, first sum them up: 18 + 15 + 21 + 10 + 24 + 21 + 18 + 16 + 20 + 22 + 18 + 18 + 12 + 21 + 25 + 20 + 19 + 23 = 346. Then, divide this total by the number of values, which is 18. Thus, the mean is 346 ÷ 18 ≈ 19.22.
Just over 20 18 + 19 + 21 + 23 = 81 81 / 4 (numbers) = 20.25
2,870,795,128,037,760 or approx 2.871*1015
The minimum drinking age in Connecticut was lowered from 21 to 18 in 1972. It was raised from 18 to 19 in 1982, raised from 19 to 20 in 1983, and raised from 20 to 21 in 1985.