Question

if the mean of 7, (x-3), 10, (x+3) and (x-5) is 15, find x?​

Answer 1

Answer:

21

Step-by-step explanation:

mean = sum of all terms / number of terms

given mean = 15 for 5 terms

15=(7+x-3+10+x+3+x-5)/5

75= 3x +12

3x=63

x=21