The product 3.09 x 304.87 = 942.0483
Step-by-step explanation:
firat one 50.24
second one 63.585
The answer for this problem is 3.66666666.
The probability that the teacher selects both boys from a seventh grader and eighth grader.
first calculate the probility that it is boy in each grade
7th
x = 7 / ( 7 + 3) = 7 / 10
8th
y = 2 / (2 + 2) = 1 / 2
so the probability
P = ( 7 / 10 ) ( 1 / 2 )
P = 0.35