Answer:
The numbers of hamburgers sold is 95
Step-by-step explanation:
If cheeseburgers sold equals 3 times hamburger
then we can say cheeseburger c = 3h, where h is hamburger
we can therefore say
h + 3h = 380
4h = 380
h = 95
Answer: The answer is 2 10/27
Answer:
B
Step-by-step explanation:
Since two people take both courses, we can subtract two from 7, 8, and 21, giving us 5, 6, and 19.
Add 5 and 6 together to get 11. Since eleven students are in those two groups, we can answer this. The answer will be 11/19.
Example of Independent events: Tossing a coin and rolling a dice. The event of the 1st doesn't influence the event of the second and vice versa. If so,
P(A∩B) = P(A).P(B) [if the 1st event is to select A AND B in the 2nd)
Now if the 1st event is to select A OR B in the second:
P(A∪B) = P(A) + P(B)