We have a normal distribution with $ \sigma = 18.6$ A line $732$ divides the area to the left of $740$ in 2 parts, such that the area of the part to the left is $1.5$ times as big as the area to the right. Get $\mu$.
This is the answer in the correction model:
Calculator with graphing ability:
$y_1 = 2 . normalcdf (-10^99, 732, X, 18.6)$
$y_2 = 3 . normalcdf (732, 740, X, 18.6)$
Calculate the intersection and that's the answer ($\mu = 746,4$)
My question is, shouldn't the 2 and the 3 be switched, since it says that the left part is 1.5 times bigger than the right part, yet here the left part is multiplied by 2 and the right part by 3..