26 over 28- 13 over 28
2 answers:
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Answer:
She can do better in math.
Step-by-step explanation:
Any point (x) from a normal distribution can be converted to the standard normal distribution (z) with the formula z=
for french x = 81 and mean 72 ,standard deviation = 9
for french the value of Z =
=
= ±1
For math x =86 and mean=68 ,standard deviation = 12
for math the value of z =±1.5
Since value of Z is more in subject math as compare to that of French
so she did better in Mathematics