A bag contains black and yellow marbles. Two marbles are drawn without replacement. The probability of selecting a black marble and the a yellow marble is 0.28. The probability of selecting a black marble on the first draw is 0.5. What is the probability of selecting a yellow marble on the second draw, given that the first marble drawn was black?

answer: none of these answers are correct only the second half is

step-by-step explanation:

step-by-step explanation:

let's assume

number of candles set =x

price of of x candles =p(x)

we are given

a candle maker prices one set of scented candles at $10 and sells an average of 200 sets each week

so, we get point as (200,10)

he finds that when he reduces the price by $1, he then sells 50 more candle sets each week

so, we can find slope

now, we can use point slope form of line

now, we can plug values

we can use point

and find b

now, we can plug it back

and we get

now, we can find revenue

we know that

revenue = price*quantity

so, we get