Answer:
140
I hope this helps with your math
Answer:
P = 25/42
Step-by-step explanation:
We are asked to calculate the probability that if two items are selected from two different boxes, what is the probability that bought are non-defective.
In the first box A, the probability of selecting a non-defective item is 5/7
In the second box B, the probability of selecting a non-defective item is 5/6
Now the probability of selecting 2 items, one from each of the boxes and both are non-defective are as follows;
5/6 * 5/7 = 25/42
Si bi almota con te illama
Answer:
77.14 minutes.
Step-by-step explanation:
Jack's time = 3 hours
Jill's time = 2.25 hours = 2 1/4 = 9/4 hours
Combined time = x
Rates :
Jack = 1/3 ; jill = 1 / 2.25 = 1 / 9/4 = 4 /9
Combined rate = 1/x
Setting up the equation :
1/3 + 4/9 = 1/x
Lcm of 3 and 9 = 9
(3 + 4) / 9 = 1/x
7/9 = 1/x
Cross multiply :
7x = 9
x = 9/7 hours
x = (9/7)* 60
x = 77.14 minutes
Combined time = 77.14 minutes.
