The heights of a certain group of adult males were found to be normally distributed. the mean of the height is 170 cm with a standard deviation of 6 cm. in a group of 1,200 of these males, about how many would be more than 164 cm tall?

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

3 4 7 12 19

+1 +3 +5 +6

i would guess 26 because this isnt a sequential pattern or its to short to know