Select the correct solution for the expression. 2/5 + 3/8
1 answer:
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Answer:
Hello!! :) The answer to your question is 13,728
Steps will be below.
Step-by-step explanation:
So we will subtract 22,403 and 8,675.
When we do that we will get 13,728
To check your answer we have to do the opposite of subtracting which will be adding.
This is how we check our work: the answer we got was 13,728...we have to take that answer and add it to 8,675 which will give us 22,403
(Both of the numbers are from the question)
At the bottom I attached a picture of how I did the subtracting and how I checked my work.
Sorry for my handwriting......if you can’t understand my handwriting, I attached another picture which is more clearer.
ANSWER TO YOUR QUESTION: 13,728
Brainliest would be appreciated! Thank you :3
Hope this helps! :)
1) Probability: 7/30 (or 23.3%)
2) Probability: 21/100 (or 21.0%)
Step-by-step explanation:
1)
At the beginning, there are 10 marbles in total in the bag, of which 7 are green and 3 are blacks.
So the probability of choosing a green marble as first is:
Then, after he picked a green marble, there are only 9 marbles left in the bag, of which 6 are green and 3 are black. Therefore, at the second time, the probability of choosing a black marble will be
Therefore, the probability that Malik will draw a green marble first and then a black marble is the product of the two probabilities:
In percentage, this is
2)
In this second case, the same experiment is repeated by this time the first ball is put back into the back after the first draw.
The probability that Malik will draw a green marble at the first attempt is the same as before:
Later, the green marble is put back in the bag, so we still have 7 green marbles and 3 black marbles. Therefore, the probability of choosing a black marble at the second draw is
Therefore, the overall probability is
In percentage,
3)
The probability in the second case is lower because in the second case, the green marble is put back into the bag after the first draw, therefore at the second draw the probability of choosing a black marble is less than the first case (because in the 2nd case, there are more marbles in total to choose from, so the probability of choosing a black marble will be less).
Learn more about probability:
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