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2 years ago

To a survey of 290 newspaper reader, 181

Mathematics

1 answer:

astra-53 [7]2 years ago

7 0

Question:

To a survey of 290 newspaper readers, 181 of them read the Daily Times, 142 Read the Guardian 117 read punch and each reads at least one of the three papers if 75 read the Daily Times, and the Guardian, 60 read the Daily Times and punch, and 54 read the Guardian and punch : Draw a Venn diagram to illustrate this information How many readers read All three papers ,Exactly two of the papers The Guardian alone?

Answer:

39 read all three news papers,72 Exactly two Papers & 52 reads Guardian Alone

Step-by-step explanation:

We have given, A survey of 290 newspaper readers.

Who read the Daily times A=181

Who read the Guardian times B=142

Who read the punch C=117

Who read Daily Times and the Guardian A\cap B= 75

Who read Daily Times and the punch A\cap C=60

Who read Guardian and punch B\cap C=54

To find :

How many readers read All three papers, Exactly two of the papers The Guardian alone?

Solution :

Readers read all three papers is $A\cap B\cap C$

Total survey is given by,

Total = $A+B + C- A\cap B- A\cap C - B\cap C+ A\cap B\cap C$

290 = $181 + 142 + 117 - 75 -60 - 54 +A\cap B\cap C$

290 = $251+A\cap B\cap C$

290-251= $A\cap B\cap C$

$A\cap B\cap C=39$

So, number of readers who read all three papers is 39.

Exactly two of the papers = 36 + 21 + 15 = 72

Guardian Alone = 52

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1 year ago

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2 years ago

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Answer:

Step-by-step explanation:

Hello!

Part A

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X: Number of boxes with an extra donut in a sample of eight.

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3. The probability of success in the same from one trial to another (In this case our "success" will be that the box has an extra donut, according to the owners claim that is 1/7; ρ=0,14)

So X≈ Bi (n;ρ)

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Part B

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1 year ago

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2 years ago

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