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Anna [14]
3 years ago
12

A coin is flipped 80 times. It lands tails 47 times. What is the P (Heads)? percentages pls

Mathematics
1 answer:
Thepotemich [5.8K]3 years ago
5 0

Answer:

%41.25

Step-by-step explanation:

80 - 47 = 33

33 divided by 80

convert to percentage

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If you remove the last digit (one’s place) from a 4-digit whole number, the resulting number is a factor of the 4-digit number.
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Answer:

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Step-by-step explanation:

We assume that your 4-digit number must be in the range 1000 to 9999. Clearly, any number ending in zero will meet your requirement:

  1000/100 = 10

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However, the requirement cannot be met when the 1s digit is other than zero.

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For some 3-digit number N and some 1s digit x, the 4-digit number will be

  4-digit number: 10N+x

Dividing this by N will give ...

  (10N+x)/N = 10 remainder x

N will only be a factor of 10N+x when x=0.

So, there are 900 4-digit numbers that meet your requirement. They range from 1000 to 9990.

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How do you know if there is an elephant in your fridge?
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slamgirl [31]

Answer:

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Step-by-step explanation:

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kumpel [21]

Answer: 65,780

Step-by-step explanation:

When we select r things from n things , we use combinations and the number of ways to select r things = ^nC_r=\dfrac{n!}{(n-r)!r!}

Given : The total number of playing cards in a deck = 52

The number of different five-card hands possible from a deck = 2,598,960

In a deck , there are 26 black cards and 26 red cards.

The number of ways to select 5 cards from 26 cards = ^{26}C_{5}=\dfrac{26!}{(26-5)!5!}

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Hence, the number of different five-card hands possible from a deck of 52 playing cards such that all are black cards = 65,780

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