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irina1246 [14]
3 years ago
6

What is the value of n?

c{2n-7}{3} =15" alt=" \frac{2n-7}{3} =15" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
kirill [66]3 years ago
5 0
\frac{2n-7}{3} = 15

2n - 7 × 1 = 15 × 3

2n - 7 = 45

2n = 45 + 7

2n = 52

n = 26

Have a nice days.........
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1000 households were surveyed. 275 households own a desktop computer, 455 households own a DVD player, 405 households own two ca
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Answer:

Step-by-step explanation:

From the given information,

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Y represents the DVD Player

Z represents the Two Cars

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n(X)=275

n(Y)=455

n(Z)=405

n(XUY)=145

n(YUZ)=195

n(XUZ)=110

n((XUYUZ))=265

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n(X ∩ Y ∩ Z) = 735

n(X ∪ Y) = n(X)+n(Y)−n(X ∩ Y)

145 = 275+455 - n(X ∩ Y)

n(X ∩ Y) = 585

n(Y ∪ Z) = n(Y) + n(Z) − n(Y ∩ Z)

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n(Y ∩ Z) = 665

n(X ∪ Z) = n(X) + n(Z) − n(X ∩ Z)

110 = 275+405-n(X ∩ Z)

n(X ∩ Z) = 570

a. n(X ∪ Y ∪ Z) = n(X) + n(Y) + n(Z) − n(X ∩ Y) − n(Y ∩ Z) − n(X ∩ Z) + n(X ∩ Y ∩ Z)

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n(X ∪ Y ∪ Z) = 50

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n(X ∪ Y ∪ C') = 95

6 0
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