Answer:
Step-by-step explanation:
P(A) = 0.70
P(B) = 0.20
P(A n B) = P(A) x P(B)
P(A n B) = 0.70 x 0.20
P(A n B) = 0.14
"Or" means that they are mutually exclusive, which it does not specifically mention, therefore B and C are out.
Answer:
30 members will play wind instruments
30% as a decimal is 0.3
Multiply 780 by 0.3
780(0.3)=234 female doctors
Answer:
1728/ 125
Step-by-step explanation:
The ratio of corresponding lengths of the figures = ratio of the square root of their areas.
So ratio of lengths = 12/5.
Now volume is 3 dimensional so the ratio is the cube of the lengths
= 12^3/5^3
= 1728/ 125.