2 years ago

In a class of 40 students, 14 students wore blue jeans.

Mathematics

2 answers:

Zina [86]2 years ago

5 0

Answer: 14:26

Step-by-step explanation:

alexandr1967 [171]2 years ago

5 0

Answer:

Step-by-step explanation:

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Jessie claims that if any number is doubled and then increased by 1, the result will be greater than 4.

Kamila [148]

Answer:

n = 1

Step-by-step explanation:

1 x 2 = 2
2 + 1 = 3
3 < 4

hope this helps

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1 year ago

The sum of three numbers is 72. One number is two times 10 and another number is three times 10. What is the third number?

noname [10]

The third number is 20

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2 years ago

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Please tell me the right answer.

Komok [63]

Answer:

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What is the product of 1/2 x -1/4 and 5x^2 - 2x + 6? Write in standard form.

geniusboy [140]

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3 years ago

James surveyed people at school and asked whether they bring their lunch to school or buy their lunch at school more often. The

Brrunno [24]

Answer:

The correct option is 4.

Step-by-step explanation:

Given information:

Bring lunch : 46 males, 254 females

Buy lunch : 176 males, 264 females

Total number of peoples is

$46+254+176+264=740$

Total number of males is

$46+176=222$

The probability of male is

$P(Male)=\frac{Males}{Total}=\frac{222}{740} =0.3$

Since probability of males is 0.3, therefore options A and C are incorrect.

Total number of persons who buys lunch is

$176+264=440$

The probability of persons who buys lunch is

$P(\text{Buys lunch})=\frac{\text{Buys lunch}}{Total}=\frac{440}{740} =\frac{22}{37}$

We need to find the probability of P(male | buys lunch).

According to the conditional probability, we get

$P(\frac{A}{B})=\frac{P(A\cap B)}{P(B)}$

P(male | buys lunch) $=\frac{P(\text{male }\cap \text{ buys lunch})}{P(\text{buys lunch})}$

P(male | buys lunch) $=\frac{\frac{176}{740}}{\frac{22}{37}}$

P(male | buys lunch) $=\frac{2}{5}=0.4$

Therefore the correct option is 4.

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3 years ago

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