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1 year ago

A 50-litre solution is 3 percent salt by volume.

Mathematics

1 answer:

yulyashka [42]1 year ago

5 0

Answer:

Step-by-step explanation:

.03(50) + 0x = (50-x).05 How much 3% salt much be added to zero percent salt to create a mixture that is 5 percent salt.

3(50) = (50 - x)5 I multiplied through by 100 to clear the decimals

150 = 250 - 5x Distribute the 5

-100 = -5x Subtract 100 from both sides of the equation

20 = x divide both sides by -5

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In a shipment of 22 smartphones, 2 are defective. How many ways can a quality control inspector randomly test 4 smartphones, of

Eddi Din [679]

Answer:

Therefore the required ways are =190

Step-by-step explanation:

Combination: Combination is the number of selection of items from a collection of items where the order of selection does not matter.

Total number of smartphones =22

Defective phone = 2

Non defective phone = (22-2) =20

The control inspector randomly test 4 smartphones of which 2 are defective.

Non defective phone = 2

The ways to select 2 non defective phone is

$^{20}C_2=\frac{20!}{2!(20-2)!} =\frac{20!}{2!18!}=\frac{19\times 20}{2} =190$

The ways to select 2 defective phone is= $^2C_2=1$

Therefore the required ways are = (190×1) =190

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2 years ago

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sveta [45]

9 games

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2 years ago

It takes 3 2/6 spoons of chocolate syrup to make 3 1/2 gallons of chocolate milk. How many spoons of syrup would it take to make

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Step-by-step explanation:

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