# math

mr. lee had a bag of red beans and a bag of black beans. 20% of the total number of beans were black, and there were 180 ounces more red beans than black beans. he transferred some red beans to the bag containing black beans, so that, the bag now contained 30% of the total number of beans. How many ounces of beans were there in the bag of mixed beans

1. 👍
2. 👎
3. 👁
1. r = b+180
b = .2(r+b)
so,
b = 60
r = 240
Total beans = 300 oz

After the transfer, 30% = 90 oz

So, that means that 30 oz of red beans were transferred, added to the 60 oz of black beans already there.

1. 👍
2. 👎
2. X oz. of black beans.

(X+180) oz. of red beans.

Total = X + (X+180) = 2x + 180.

X/(2x+180) = 0.20
x = 0.4x + 36
0.6x = 36
X = 60 Oz. of Black beans.

X+180 = 60+180 = 240 Oz. of red beans.

Total = 60 + 240 = 300 oz. of beans.

0.3 * 300 = 90 oz. of mixed beans.

1. 👍
2. 👎
3. i love to

1. 👍
2. 👎
4. pawg

1. 👍
2. 👎
5. Is this actually correct?

1. 👍
2. 👎

## Similar Questions

1. ### 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?

2. ### Math Probabilities

A bag contains 9 red chips and 12 blue chips. Two chips are selected randomly without replacement from the bag. What is the probability that the two chips are the same color? That would be the probability of two reds PLUS the

3. ### math

A bag contains 100 marbles, some red and some purple. Suppose a student, without looking, chooses a marble out of the bag, records the color, and then places that marble back in the bag. The student has recorded 9 red marbles and

4. ### statistics

The red face cards and the black cards numbered 2-9 are put into a bag. Four cards are drawn at random without replacement. Find the following probabilities: a) All 4 cards are red b) 2 cards are red and two cards are black c) At

1. ### Mathematics

6 black counters and 4 white counters in bag A. 7 black counters and 3 white counters in bag B. 5 black counters and 5 white counters in bag C. Tarek takes at random a counter from bag A and puts the counter in bag B. He then

2. ### math

Results of a survey of fifty students indicate that 30 like red jelly beans, 29 like green jelly beans, and 17 like both red and green jelly beans. How many of the students surveyed like no green jelly beans?

3. ### science

Listed below are six mixtures. Identify physical properties of the components that allow you to separate them. Then, explain the method you would use to separate the components. Mixture 1: Salt dissolved in water Physical

4. ### Science

Two students pulling a bag of volleyball equipment. The friction for between the bag and the floor is 15 N. What is the net force acting on the bag? What is the acceleration of the bag?

1. ### Math-Algebra 1

You have a bag which contains only red and green marbles. In this bag with x^2+5 marbles total, x+1 are red. Also, x-3 marbles have a scratch on them. The probability of drawing a red marble from the original bag is equal to that

2. ### Discrete Probability (Math)

A box contains 19 yellow, 29 green and 37 red jelly beans. If 14 jelly beans are selected at random, what is the probability that 5 are yellow?

3. ### Algebra

A bag consists of 4 different colored marbles. The probability of drawing each is as follows: P (Blue)=. 4 P (Red)= .2 P (Purple)= .3 P (Black)= .1 You draw a marble out of the bag and then replace it. What is the probability that

4. ### Math

In a bag of 400 jelly beans, 25% of the jelly beans are red in color. If you randomly pick a jelly bean from the bag, what is the probability that the jelly bean picked is NOT one of red jelly beans?