B should equal 10. you just have to figure out what would get you b and then you can figure it out from there!!
Answer:
Step-by-step explanation:
Answer:
11 grades of 85 did Brenda, Robert, and Timothy receive altogether.
Step-by-step explanation:
Let 6x be the number of 85 received by Brenda.
The number of 85 received by Robert is 1/3 of Brenda= 2x
The number of 85 received by Timothy is 1/2 of Brenda= 3x
Then according to the given conditions
6x+ 2x+ 3x
= 11x
So the number of total 85s received by all the three is 11.
11 grades of 85 did Brenda, Robert, and Timothy receive altogether.
Answer:
The probability of drawing an odd numbered ticket is 60%.
Step-by-step explanation:
Odd numbered tickets:
Probability of one is 1/5 plus half of 1/5.

Probability of 3 is half of 1/5.

Probability of 5 is 1/5. So

Probability of drawing an odd numbered ticket:

0.6*100% = 60%
The probability of drawing an odd numbered ticket is 60%.

which is undefined when

or

. The answer is then the third choice.