Math

posted by .

The ratio of red jelly beans to yellow ones is 3:4. If I eat 3 red ones and 6 yellow ones, the ratio is 4:5. How many yellow ones to begin with?

• Math -

number of reds ---- 3x
number of yellows -- 4x

(3x-3)/(4x-6) = 4/5
16x - 24 = 15x - 15
x = 9

number of reds at the start = 3(9) = 27
number of yellows at the start = 4(9) = 36

check: origianl ratio = 27/36 = 3/4
after "eating" ratio = 24/30 = 4/5

Similar Questions

1. hard math

The jelly Junior school color is made by mixing red paint and yellow paint. The ratio of red to yellow is 3 to 5. How much red paint should be mixed with 20 oz of yellow?
2. probability and counting

(1 pt) A box contains 25 yellow, 28 green and 38 red jelly beans. If 13 jelly beans are selected at random, what is the probability that: a) 5 are yellow?
3. math

The ratio of red jelly beans to yellow jelly beans in a dish is 2:3. If I eat 3 red jelly beans and 6 yellow ones the ratos is 4:5. How many yellow jelly beans were orginally in the dish?
4. Math

The ratio of red jelly beans to yellow jelly beans in a dish is 3:4. if greg eats 3 red jelly beans and 6 yellow ones, the ratio is 4;5. how many jelly beans were originally in the dish?
5. Math

The ratio of red jelly beans to yellow jelly beans in a dish is 3:4. If Greg eats 3 red jelly beans and 6 yellow ones, the ratio is 4:5. How many yellow jelly beans were originally in the dish?
6. math

if greg eats 3 red jelly beans and 6 yellow ones how many yellow were there originally?
7. math125

Twenty marbles are used to spell a wordâ€”9 blue ones, 5 red ones, 3 yellow ones and 3 green ones. If two marbles are drawn from the set of twenty marbles at random in succession and without replacement, what is the probability (as …
8. math

The ratio of red jelly beans to yellow jelly beans in a dish is 3.4. If Greg eats 3 red ones and 6 yellow ones, the ratio is 4.5. How many yellow jelly beans were originally in the dish?
9. Math

Tory has 4 blue jelly beans, 6 red jelly beans, 5 yellow jelly beans, and 1 green jelly bean in his bag. What fraction of the jelly beans are A)Blue B)Yellow C)Red D)Green
10. Math

You have a jar with 60 jelly beans. You know that 1/3 of the jelly beans are yellow, 1/4 of them are white and the rest is red. You are not allowed to look. How many beans do you have to take out to be absolutely sure to get at least …

More Similar Questions