Given f(x)=−2 • 2+8, evaluate f(3)

The complete question is: In a survey of consumers aged 12 and older, respondents were asked how many cell phones were in use by the household. (No two respondents were from the same household.) Among the respondents, 215 answered "none", 280 said "one", 362 said "two", 149 said "three," and 140 responded with four or more. A survey respondent is selected at random. Find the probability that his/her household has four or more cell phones in use. Is it unlikely for a household to have four or more cell phones in use? Consider an event to be unlikely if its probability is less than or equal to 0.05.

We are given that among the respondents, 215 answered "none", 280 said "one", 362 said "two", 149 said "three," and 140 responded with four or more.

A survey respondent is selected at random.

As we know that the probability of any event is calculated as;

Probability = $\frac{\text{Favorable number of outcomes}}{\text{Total number of outcomes}}$

Here, we have to find the probability that his/her household has four or more cell phones in use;

Number of respondent having four or more cell phones in use = 140

Total number of respondents asked = 215 + 280 + 362 + 149 + 140 = 1146

So, the required probability = $\frac{140}{1146}$

= 0.122 or 12.2%

No, it is not unlikely for a household to have four or more cell phones in use because the probability is not less than or equal to 0.05 but in actual it is greater than 0.05.

6 0

3 years ago

Which values are solutions to the inequality below? Check all that apply. >4

kirza4 [7]

B and C because sqrt of 16=4 so sqrt of anything larger than 16 is greater than 4

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4 years ago

Read 2 more answers

A red candle is 8 inches y'all and burns at a rate of 7 divided by 10 inch per hour. A blue candle is 6 inches tall and burns at

lorasvet [3.4K]

Answer:

Both candles will have the same height after 4 hours.