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3 years ago

Please help......... I am pretty confused.

Mathematics

2 answers:

Furkat [3]3 years ago

6 0

Answer:

2.5-5

Step-by-step explanation:

Gnesinka [82]3 years ago

5 0

What he said lol did

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A factory received a shipment of 11 hammers, and the vendor who sold the items knows there are 2 hammers in the shipment that ar

zhenek [66]

Question:

If a sample of 2 hammer is selected

(a) find the probability that all in the sample are defective.

(b) find the probability that none in the sample are defective.

Answer:

a $Pr = \frac{2}{110}$

b $Pr = \frac{72}{110}$

Step-by-step explanation:

Given

$n = 11$ --- hammers

$r = 2$ --- selection

This will be treated as selection without replacement. So, 1 will be subtracted from subsequent probabilities

Solving (a): Probability that both selection are defective.

For two selections, the probability that all are defective is:

$Pr = P(D) * P(D)$

$Pr = \frac{2}{11} * \frac{2-1}{11-1}$

$Pr = \frac{2}{11} * \frac{1}{10}$

$Pr = \frac{2}{110}$

Solving (b): Probability that none are defective.

The probability that a selection is not defective is:

$P(D') = \frac{9}{11}$

For two selections, the probability that all are not defective is:

$Pr = P(D') * P(D')$

$Pr = \frac{9}{11} * \frac{9-1}{11-1}$

$Pr = \frac{9}{11} * \frac{8}{10}$

$Pr = \frac{72}{110}$

8 0

2 years ago

I don't know how to do this. Please help

Aleonysh [2.5K]

Answer:

63m³

Step-by-step explanation:

volume of a cylinder = πr²h

r = 2m, h = 5m

= 22/7 × 2² × 5

= 62.86m³

approx 63m³

4 0

2 years ago

Code Namo

Cerrena [4.2K]

Answer:

Step-by-step explanation:

5 0

2 years ago

Help please please need quick

timama [110]

14 times 14=196
7 times 7= 49
196-49=147
The length of X is approximately 7 root 3. Or 12.12 as a decimal

8 0

2 years ago

Order the numbers from least to greatest.<br><br> −34, 0.5, 23,−73, 1.2

dybincka [34]

Answer:

0.5,1.2,23,-34,-73

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers