So, she paid (75-17.34=57.66) for the purchase
Or, the jeans costed 57.66-3.26=54.4 (prize minus sales tax)
But she got a 10 dollars off! so that means that the jeans actually costed 64.4
now, the 64.40 was the prize discounted by 30%:
64.40=(100-30)%*x
where x was the original prize
64.40=0.7x
644=7x
x=644/7
x=92
so the original prize was 92 dollars.
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:
Step-by-step explanation:
The theoretical result is 0.2 * 20 = 4
The experimental result is 1/2 * 20 = 10
The difference is 10 - 4 = 6
The probability difference = 6/20 = 0.3
Your answer would be
7 6/12
or it would also be considered 7 1/2
Hope this helps!! :]
