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Question 1 of 3

7.5 g of drug X are available which are to be given in doses of 50 mg. How many doses of drug X can be given?

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doses
There are 150 doses of 50 mg in 7.5 g.

First convert 7.5 g to milligrams by multiplying by 1000.
If there are 7500 mg and each dose is 50 mg, then
the number of doses is 7500 divided by 50.

Number of Doses = Total Amount of Drug
Size of Single Dose

Number of Doses = 7500
50
Number of Doses = 150.

Number of Doses = Total Amount of Drug
Size of Single Dose

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Question 2 of 3

400 mg of drug Y is available. How many doses of 30 mg can be given?

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doses
There are 13 doses of 30 mg in 400 mg of dose Y.

If there are 400 mg and each dose is 30 mg, then the number of doses is 400 divided by 30.

Number of Doses = Total Amount of Drug
Size of Single Dose

Number of Doses = 400
30
Number of Doses = 13 - you can only have whole doses

Number of Doses = Total Amount of Drug
Size of Single Dose

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Question 3 of 3

Drug Z is given in doses of 500 µl. How many doses can be given if there are 7 ml of drug Z available?

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doses
There are 14 doses of 500 µl in 7 ml of drug Z.

First convert the dose and the total amount to the same unit eg microlitres.
7 ml = 7 x 1000 = 7000 µl

If there are 7000 ml and each dose is 500 µl, then
the number of doses is 7000 divided by 500.

Number of Doses = Total Amount of Drug
Size of Single Dose

Number of Doses = 7000
500
Number of Doses = 14

Number of Doses = Total Amount of Drug
Size of Single Dose

No, that is not the correct answer.

Have another go: just type in your new answer and press Return.

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