What is the answer to (((4^2-(7 x 2))4x2)-2x3+(5x2)÷2-5?

1 answer:

6 0

${4}^{2} = 4 \times 4 = 16$
$((16 - (14)) = 2$
$((2)4 \times 2) = (2 \times 8) = 16$
$((16) - 2 \times 3) = 16 - 6 = 10$
$(10 + (5 \times 2)) = 10 + (10) = 20$
$(20 \div 2) = 10$
$10 - 5 = 5$

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Step-by-step explanation:

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If five numbers are selected at random from the set {1,2,3,...,20}, what is the probability that their minimum is larger than 5?

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Answer:

the probability that their minimum is larger than 5 is 0.2373

Step-by-step explanation:

For calculate the probability we need to make a división between the total ways to selected the 5 numbers and the ways to select the five numbers in which every number is larger than 5.

So the number of possibilities to select 5 numbers from 20 is:

20 * 20 * 20 * 20 * 20

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Then the number of possibilities in which their minimum number is larger than 5 is calculate as:

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This time for every option we can choose number from 6 to 20, so we have 15 numbers for every option and the total ways that satisfy the condition are $15^{5}$