The mean of a,b and c is 16.if d=14,what is the mean of a,b,c and_英语解答

The mean of a,b and c is 16.if d=14,what is the mean of a,b,c and

人气：135 ℃　时间：2020-02-06 05:33:15

解答

a + b + c = 48
a + b + c + d = 48 + 14 = 62
mean(a,b,c,d) = 62/4 = 15.5