Question

Q7. There are five envelopes on a table. Four of the envelopes are marked 8, 2, 4 and 1. You are told that the mean of the numbers on the envelopes is 4. What is the number on the fifth envelope?

Answer 1

Answer:

31

Step-by-step explanation:

31+3+3+2+2+2++22++2+2+2+2+2+2++2+2+2+2=9_9

Answer 2

Answer:

5

Step-by-step explanation:

The mean value is simply the average of the numbers.

(8+2+4+1+x)/5=4

15+x=20

x=5