(a) * (a+1) = 420
a^2 + a = 420
a^2 + a - 420 = 0
(a+21)(a-20) = 0
a = -21 OR 20
The two integers can be -21 and -20, OR 20 and 21.
Answer:
The probability that two orange marbles are drawn (and only those two), is 1/66, or approximately 1.5%
Step-by-step explanation:
The total number of marbles in the bag is 2 + 4 + 6, which equals 12.
We're told that there are two yellow marbles, so the chance of picking a yellow one on the first try is 2/12, or 1/6.
After that marble is drawn, we now have 11 marbles in the bag, and only 1 of them is yellow, so the chance of drawing a second yellow marble is 1/11
The total probability of drawing two yellow marbles then is:
1/6 × 1/11 = 1/66, or approximately 1.5%
4 baskets as the largest number divisible by 32 is 8 and the other 2 are also divisible by 8
