Try this solution:
1. for probability of both televisions work:
2. for probability of at least on is defective (it means, the sum = one is defective and two are defective):
- for P(1defective);
- for P(2defective);
totaly for at least one is defective:
Answer:
The least common denominator of the fraction is 14
1/2= 7/14
1/7= 2/14
Bill tells Matt that he has 3 kids. This means that in this item, we have three unknowns, those are the ages of the three kids. First, the product of the ages is 72.
(x)(y)(z) = 72
Also, for the sum of their ages, we have
x + y + z =?
There are three variables in the equation which means that 3 equations should also be presented to determine the ages of the three children.
18 !
27/x = 12/8
Cross multiply and then solve
Step-by-step explanation:
note A- b = A n B
so, ( A n B ) = ( 3, 4 )
( A n B )' = ( 0,1,2,5,6,7)
