1/2 of 30 = 15
1/4 of 30 = 7.5
just divide 30 by 2 and 4
your welcome :)
Answer:
0.3667 or 36.67%
Step-by-step explanation:
The probability of getting at least 1 defective hard disk among the 5 (P(X>0)) is equal to 100% minus the probability of getting none defectives (1-P(X=0)).
If 23 out of 25 hard disks are non-defective, the probability is:

The probability that there is at least 1 defective hard disk is 0.3667 or 36.67%.
Answer:
Bro Man thats OP
Step-by-step explanation:
20 people are there. Each eat 4 slices of pizza.
Each pizza contains 8 slices.
By forming it as an equation,
20(4) = 8(x pizza)
No of pizzas to be ordered = 10