3 years ago

There are 11pens in a box.

1 answer:

4 0

Answer:

If both pens are the same color, it means that they are either black and black or red and red.If without replacement,pr. of first black and second black is

8/11 and 7/10.Also, the pr of the first red and sencond red pen= 3/11 and 2/10.

Therefore pr. of bb or rr

(8/11×7/10)+(3/11×2/10)

56/110+6/110 =31/50

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3 years ago

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3 years ago

You need $2,500 as a deposit for a new car. You have already saved 50% of this amount. Which calculation could you use to check

Taya2010 [7]

well, 50% is pretty much half.

you need 2500 for the deposit, you have 50% or half of that.

whatever% of anything is just (whatever/100) * anything.

50% of 2500 is just (50/100) * 2500 or 0.5 * 2500 or 1250.

how much more do you need? well, you need the other 50%.

50% of 2500 is just (50/100) * 2500 or 0.5 * 2500 or 1250.

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4 years ago