Answer:
400
Step-by-step explanation:
the answer is A i believe
The possible combinations are:
1,9
2,8
3,7
4,6
9,1
8,2
7,3
6,4
Total straws: 9
Probability of first being 1: 1/9
Probability of second being 9: 1/8
Probability of both: 1/9 x 1/8 = 1/72
This will be multiplied by 8 as there are 8 possible combinations:
8 x 1/72
= 8/72
= 1/9
4 gallons = 25% alcohol
He wants 50% alcohol, therefore, let’s double the amount.
8 gallons = 50% alcohol
Answer is 4 more gallons should be added to have 50% alcohol