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3 years ago

Which survey is biased?

Mathematics

2 answers:

baherus [9]3 years ago

8 0

Option b) going to grocery store and asking people what type of food is their favourite

Shkiper50 [21]3 years ago

6 0

Answer:

Step-by-step explanation:

A is biased because those people at the grocery store will most likely like that grocery store, since they went there to shop in the first place.

B, C, and D are not biased because there is no correlation between the grocery store and the survey questions.

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Answer:

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2 years ago

A chemical company mixes pure water with their premium antifreeze solution to create an inexpensive antifreeze mixture. The prem

Ne4ueva [31]

Answer:

premium: 165 gallons
water: 120 gallons

Step-by-step explanation:

Let 'a' represent the amount of 95% antifreeze in the mix. Then the amount of water is (285 -a). The mix has this amount of antifreeze in it:

0.95a +0(285 -a) = 0.55(285)

a = 0.55/0.95(285) = 165 . . . gallons of 95%

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2 years ago

If you are dealt 5 cards at random from a standard deck of playing cards, what is the probability that at most 4 of them are spa

alexira [117]

Answer:

Step-by-step explanation:

No of ways in which 5 cards are chosen is $N=^{52}C_5$

No of ways in which at most 4 cards are spades $N_0=$ Total ways-5 spades

$=^{52}C_5-^{13}C_5$

Probability that at most 4 cards are spade $P=\frac{N_0}{N}$

$P=\frac{^{52}C_5-^{13}C_5}{^{52}C_5}$

$P=\frac{2598960-1287}{2598960}$

$P=\frac{2597673}{2598960}=0.9995$

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3 years ago

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The answer is 12 ÷ 3

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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