Answer:
20 elements.
Step-by-step explanation:
Lets say
n(U) = 114
n(A) = 57
n(B) = 79
n(A n B)= 42
Now,
n(A U B) = n(A) + n(B) - n(A n B)
= 57 + 79 - 42
= 94
Now,
n(A U B) compliment = n(U) - n(A U B)
= 114 - 94
= 20
Answer:
28 hours
Step-by-step explanation:
6x28=168
Answer:
28.95
Step-by-step explanation:
x+2.45=31.4
x=31.4-2.45
x=28.95
