Question

Average of first seven numbers in row is 45. Average of first four is 42. Average of

last 4 is 46. What is 4th number?​

Answer 1

Answer:

37

Step-by-step explanation:

let first three numbers be a, fourth be b and last three be c

therefore

45= (a+b+c)/7

a+c = 315 - b

42= (a+b)/4

a = 168 - b

46 = (c+b)/4

c = 184 - b

a+c = 315 - b

168 - b + 184 - b = 315 - b

b = 37. (by solving the above)

so, fourth number is 37.

I think it's right

Mark me as brainliest if this helps! :)

Answer 2

Answer:

37 is the answer

Hope this helps u