Question

there are four known numbers .the mean of the first two numbers is 4 and the mean of the first three is 9 .the mean of all four number id 15 if one of the four number is 2 find the other numbers​

Answer 1

Step-by-step explanation:

the mean of the first 2 numbers is 4 2*4=8

the mean of the first 3 numbers is 9 3*9=27

the mean of the all 4 numbers is 15 4*15=60

one of the first number is 2

first number =2

second number=8-2=6

third number=27-8=19

fourth number=60-27=33