Answer: P(A and B) is greater than P(A)
P(A and B) should be smaller than P(A).
Step-by-step explanation:
Given : P(A and B) = 0.40
P(A) = 0.20
Using the given formula of the conditional probability will be

But we know that the probability of any event cannot be more than 1.
Also, the probability of the intersection must be less than the probability of individual event.
Thus , in the given question P(A and B) must be smaller than P(A).
Answer:
n=3
Step-by-step explanation:
Operation used is division
Since order is important...
12!/(12-3)!=1320
or if you prefer
12*11*10=1320
Use double angle identity:

After substituting and moving to Right side of equation:

This is a quadratic, which can be solved by factoring or quadratic formula.
It may be helpful to replace sin(x) with another variable, then solve.

Now substitute sin(x) back in, we have

Using a unit circle or inverse sine function in calculator we can find the appropriate angles.
Answer:
Value C is equivalent to value a and b
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