2 years ago

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1 answer:

3 0

Answer:

The third one is unbiased because its not specific and it's not involving a group of people or a comparison of things. It's also not specific. It's asking about lowering the expensive sales tax in the city and not to certain people, etc..

Hope it's right:)

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Two new drugs are to be tested using a group of 60 laboratory mice, each tagged with a number for identification purposes. Drug

lakkis [162]

Answer:

4.979044478499338 × 10²⁶

Step-by-step explanation:

Combination can be used to determine the number of ways the mice can be selected for the drugs (A, B) and the control group.

Combination factorial is define by ⁿCr = $\frac{n!}{(n-r)!r!}$

21 group of mice receiving Drug A can be selected in ⁶⁰C₂₁ = $\frac{60!}{21!39!}$

(60 - 21 = 39 ) mice remained for selection of 21 mice for the second drug

Drug B 21 mice can be chosen with ³⁹C₂₁ = $\frac{39!}{21!18!}$

( 39 - 21 = 18) remained for control with ¹⁸C₁₈ = $\frac{18!}{18!0!}$

The number of ways the mice can be chosen for drug A, drug B and the control = ⁶⁰C₂₁ × ³⁹C₂₁ × ¹⁸C₁₈ = $\frac{60!}{21!39!}$ × $\frac{39!}{21!18!}$ × $\frac{18!}{18!0!}$ = 4.979044478499338 × 10²⁶

8 0

2 years ago

a rectangular piece of paper 71 cm long and 10m wide . a cylinder is formed by rolling the paper along its length , find volume

natka813 [3]

Answer:

Volume=355 cm³

Step-by-step explanation:

I assume it should be 10 cm, not 10 m. If it is 10 m, everything will have to be adjusted.

Circumference = 2 $\pi$ r