Question

Find P(blue and even).



A. 3/5
B. 1/10
c. 7/10

Answer 1

Answer: A. 3/5

Explanation:

Assuming that they are colorful blocks,

• There are in total 10 blocks
• There are in total 2 blue blocks
• There are in total 5 even blocks

Blue blocks: 1, 2

Even blocks: 2, 4, 6, 8, 10

The net total of blue and even blocks:

• 2 + 5 = 7 blocks

However, as we can see from above, the number [2] is repeated in both cases, thus we shall subtract one of them from the total number.

• 7 - 1 = 6 blocks

We analyzed at the beginning where there are 10 blocks in total. Then, utilizing the probability formula below:

• 6/10 = 3/5

Hope this helps!! :)

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