Answer:
1/2
Step-by-step explanation:
Divide it by 2 on both sides. 2/2 is 1. 4/2 is 2. So 1/2
Answer:
0.8041
Step-by-step explanation:
We know that
μ=72 and σ=5
and P(65<X<78)
We can determine the Z value as (X-μ)/σ
P( 65<X<78 )=P( 65-72< X-μ<78-72)


To fine the Z values:

From the standard normal tables:

to find P ( Z<-1.4)

From the standard normal tables:

Therefore


Answer:
3/9 and 6/9
Step-by-step explanation:
3/9 is simplified to 1/3
6/9 is simplified to 2/3
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