Mathematics, 06.04.2020 19:31 12375819

The two-way table shows the number of books of each type in Eliza’s home. A 5-column table has 3 rows. The first column has entries hardcover, paperback, total. The second column is labeled Fiction with entries 28, 4, 32. The third column is labeled biographies with entries 2, 1, 3. The fourth column is labeled Reference with entries 10, 15, 25. The fifth column is labeled Total with entries 40, 20, 60. What is the probability that a randomly selected reference book is hardcover? 0.25 0.4 0.6 0.75

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Answer from: SushiMagic

The probability of selected reference book is hardcover is 0.4.

Given A 5-column table has 3 rows.

Fiction Biographies Reference Total

Hardcover 28 2 10 40

Paperback 4 1 15 20

Total 32 3 25 60

The probability of selected reference book is hardcover means the total outcomes is the reference book and the event is hardcover.

The total of the reference books is 25

The number of reference books with hardcover is 10.

Probability rule for any event A = A outcomes / total outcomes.

P(hardcover/reference) = $\frac{10}{25}$

P(hardcover/reference) = $\frac{2}{5}$

P(hardcover/reference) = 0.4 .

Hence the probability of selected reference book is hardcover is 0.4.

For more details on probability follow the link below:

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Answer from: milkshakegrande101

The probability that a randomly selected reference book is hardcover is 0.4 ⇒ 2nd answer

Step-by-step explanation:

Lets write the table to solve the problem

→ : Fiction : Biographies : Reference : Total

→ Hardcover : 28 : 2 : 10 : 40

→ Paperback : 4 : 1 : 15 : 20

→ Total : 32 : 3 : 25 : 60

The probability of selected reference book is hardcover means the total outcomes is the reference book and the event is hardcover

∵ The total of the reference books is 25

∵ The number of reference books with hardcover is 10

- Probability rule for any event A = A outcomes / total outcomes

∴ P(hardcover/reference) = $\frac{10}{25}$

- Simplify it by divide up and down by 5

∴ P(hardcover/reference) = $\frac{2}{5}$ = 0.4

∴ P(hardcover/reference) = 0.4

The probability that a randomly selected reference book is hardcover is 0.4

Answer from: Quest

Its equal to d=7.07in

Answer from: Quest

Abit confused about what you mean, but i think you might be referring to slope intercept form: y = mx + bin that case b, or the y intercept is already given.(0,-1)find the slope by using the formulay2 - y1/x2 - x1the final slope will be 4/2, equivalent to 2.now your equation should look like thisy = 4/2x -1sorry if this didn’t you out!

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