49cm Would be your answer, sorry for the late reply
To find the value take the b and divide it by two. then square it. here your b value is 2 so 2/2 is 1. squared is. 1.
Answer: 3,19 which is larger than the original
Step-by-step explanation: if you consider that the original average is 3 you can say that all 25 students have 3 siblings so the average is 3, if you add another students with 8 siblings and do some math (25*3+8)/26 its 3,19