Question

find the value of p, if the mean of given distribution is 20.
x         f
15       2
17       3
19       4
20+p    5p
23        6

Answer 1

15+17+19+20+p+23=20*5
p=100-94
p=6
2+3+4+5p+6=20*5
15+5p=100
p=17