Shade the grid to represent the ratio 9/25. Then find a percent equivalent to the given ratio.

Mathematics

1 answer:

anzhelika [568]3 years ago

3 0

Answers and workings in the attachment below.

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Michelle draws a card from a standard deck of 52 cards. She replaces the card and draws a second card. What is the probability t

erma4kov [3.2K]

To draw a heart, one would be choosing 1 card of 13 possible hearts, and 0 from the remaining 39 non-hearts. With respect to the entire deck, one would be choosing 1 card from 52 total cards. So the probability of drawing a heart is

$\dfrac{\dbinom{13}1\cdot\dbinom{39}0}{\dbinom{52}1}=\dfrac{13\cdot1}{52}=\dfrac14$

When Michelle replaces the card, the deck returns the normal, so the probability of drawing any card from a given suit is the same, $\dfrac14$ . In other words, drawing a spade is independent of having drawn the heart first.

So the probability of drawing a heart, replacing it, then drawing a spade is $\dfrac14\cdot\dfrac14=\dfrac1{16}$ .

4 0

3 years ago

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There are 1920 fence post used in a 12 kilometer stretch of fence how many fence post are used in 1 kilometer of fence

Nonamiya [84]

160 posts are used per 1 km

3 0

3 years ago

I’m thinking the answer should be B right ??

laiz [17]

Hello!

The formula for the volume of a sphere is $\frac{4}{3} \pi r$ ³.