The answer is the third one. which is:
He made a computation error when he added 10.35+7.6
Answer:
−8x^2−2x+13
collect the like terms then simplify
20 possibilities based on this as a combination not a permutation, 6 nCr 3 = 20
Probability that the first card is not a club is 1 minus probability that it is a club. i.e. 1 - 1/4 = 3/4
Probability that the second card is a diamond = 1/4
Probability that the first card is not a club AND the second card is a diamond is 3/4 x 1/4 = 3/16
The midpoint would be (5,9)
