Aand b are two events. let p(a)=0.5 , p(b)=0.9 and p(a and b)=0.15 . which statement is true? a and b are independent events because p(a|b)=p(b) and p(b|a)=p(a) . a and b are not independent events because p(a|b)=p(a) and p(b|a)=p(b) . a and b are not independent events because p(a|b)≠p(a) . a and b are not independent events because p(a|b)=p(b) and p(b|a)=p(a) .

option-C

Step-by-step explanation:

we are given

Let P(A)=0.5

P(B)=0.9

P(A and B)=0.15

we know that

now, we can plug values

but we have

P(A)=0.5

we can see that both are not equal

so, A and B are not independent

so, option-C........Answer

start with a line segment pq that we will copy. mark a point r that will be one endpoint of the new line segment. set the compasses' point on the point p of the line segment to be copied. adjust the compasses' width to the point q. the compasses' width is now equal to the length of the line segment pq.

step-by-step explanation: