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Pavel [41]
3 years ago
10

A box of chocolates contains 18 chocolate squares. 10 of the squares are milk chocolate five or dark chocolate and three or whit

e chocolate. If Christina randomly chooses a chocolate out of the box what is the probability of her choosing a white chocolate square
Mathematics
1 answer:
a_sh-v [17]3 years ago
7 0

Answer: 55% she chooses a white chocolate

Step-by-step explanation: Just do the total number of squares which is 18, and divide that into the number of squares of the chocolate your trying to find the % or probability of.

10/18=.55 or 55%

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The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.30​, and the sample statistics
IrinaK [193]

Answer: 0.84

Step-by-step explanation:

let p be the population proportion of adults who smoked a cigarette in the past week.

As per given , we have

H_a: p

Sample size : n= 1491

The sample proportion of adults smoked a cigarette= \hat{p}=\dfrac{x}{n}=\dfrac{462}{1491}=0.30985915493\approx0.31

The test statistic for proportion is given by :-

z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}

Substitute all the values , we get

z=\dfrac{0.31-0.30}{\sqrt{\dfrac{0.30(1-0.30)}{1491}}}\\\\=\dfrac{0.01}{\sqrt{0.000141}}\\\\=\dfrac{0.01}{0.011874342087}=0.84261497731\approx0.84

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6 0
4 years ago
Which expression is a difference of a number and a product?
ziro4ka [17]
Answer: 20-4x

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8 0
3 years ago
A player is randomly dealt a sequence of 13 cards from a deck of 52-cards. All sequences of 13 cards are equally likely. In an e
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Answer:

Answer is 1/13

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