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gtnhenbr [62]
3 years ago
8

Andy and Donald are both running toward the soccer ball during a game.

Mathematics
1 answer:
kvv77 [185]3 years ago
8 0

Answer:

Have you got the answer yet?

Step-by-step explanation:

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A deck of cards with four suits; hearts, diamonds, spades, and clubs. you pick one card, put it back and thennpick another card.
Llana [10]

1. First, let us find the probability that the first card is a diamond.

Now, since we are given that there are four suits and there are, assumably, an equal number of cards in each suit, we can say that the probability of choosing a diamond card is 1/4. We can also write this out as such, where D = Diamond:

Pr(D) = no. of diamond cards / total number of cards

There are 52 cards in a deck, and 13 cards of each suit, thus:

Pr(D) = 13/52 = 1/4

2. Now we need to calculate the probability of not choosing a diamond as the second card.

In many cases, when given a problem that requires you to find the probability of something not happening, it may be easier to set it out as such:

Pr(A') = 1 - Pr(A)

ie. Pr(A not happening, or not A) = 1 - Pr(A happening, or A)

This works because the total probability is always 1 (100%), and it makes sense that to find the probability of A not happening, we take the total probability and subtract the probability of A actually happening.

Thus, given that we have already calculated that the probability of choosing a Diamond is 1/4, we can now set this out as such:

Pr(D') = 1 - Pr(D)

Pr(D') = 1 - 1/4

Pr(D') = 3/4

3. Now we come to the final step. To find the probability of something and then something else happening, we must multiply the two probabilities together. Thus, given that Pr(D) = 1/4 and Pr(D') = 3/4, we get:

Pr(D)*Pr(D') = (1/4)*(3/4)

= 3/16

Thus, the probability of choosing a diamond as the first card and then not choosing a diamond as the second card is 3/16.

7 0
3 years ago
Plz help, 20 points for a answer, plz help asap
ycow [4]
If we round it
1) 7 people
2) 4 people
3) 5 people

6 0
2 years ago
What is 55-22 asap I USED MY HANDS BUT -_-
jok3333 [9.3K]

Answer:

33 there you go

Step-by-step explanation:

4 0
2 years ago
Two triangles are similar, and the ratio of the corresponding sides is 1:5, and which of the following is true?
IrinaK [193]

Answer:

c

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Can you help me with this math problem? <br><br> (x+ 2) ^ 2 <br> (squared) <br><br> thankyou
Alex787 [66]
Answer: x^2 + 4x + 4

Explanation:
just expand, factor out, and add together.

(x+2)(x+2)

x • x = x^2
2x + 2x = 4x
2 • 2 = 4

x^2 + 4x + 4
8 0
3 years ago
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