Question

Find x if the average of 20, 20, 19, 13, and x is 16.
A. 6
B. 8
C. 9
D. 10

Answer 1

b

Answer 2

b is correct

Answer 3

(20+20+19+13+x)/5=16
72+x=80
x=8,b

Answer 4

How did you get 72+x=80 ????

Answer 5

add 20 20 19 13 gives 72 multiply 16 by 5 gives 80

Answer 6

I see how to do it now. Thank you @MAYUR2345 and @imyint .

Answer 7

Can you guys help me with another one please?

Answer 8

While attending a film festival you decide that there are 13 movies that you are interested in seeing. However, you only have time to see 7 movies. In how many different ways can you watch 7 of the 13 movies?
A. 8,648,640
B. 13
C. 665,280
D. 4,324,320

Answer 9

a calculate 13P7