Can someone please help me with this it is really hard. (I need work to)

Mathematics

1 answer:

VMariaS [17]3 years ago

8 0

Answer:

Look below.

Step-by-step explanation:

Q1. Impossible goes with probability = 0

Unlikely goes with probability < 1/2

Likely goes with probability > 1/2

Certain goes with probability = 1

Q2. So there are 25 aprons in all. Without green there are 18

18 / 25

Q3. Yes, because the everyone gets a fair chance in being picked first since there are 18 kids and 18 slips.

Q4. Number 2 is true

Number 3 is true

Number 5 is true

Q5. There is a probability of 0 because there is only the number 1 - 12 on the die. No greater.

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-k(-4k^2+k+2) Best one and simplest one gets the brainliest, I'm In a rush.

sasho [114]

Answer:

4k^3 - k^2 - 2k

Step-by-step explanation:

-k * -4k^2 = 4k^3

-k * k = -k^2

-k * 2 = -2k

4k^3 - k^2 - 2k

4 0

3 years ago

Read 2 more answers

Please help and show working (please)

Alexxandr [17]

In mathematical notation, ∑ means summation. So wherever you see the symbol, you have to sum over all elements in the set. Let's solve the question.

a. ∑m means, to sum all elements in the set m: ∑m = 12 + 15 + 20 + 30 = 77

b. ∑ $f^{2}$ means to sum all elements in the set f as the square of the elements f = $5^{2} + 9^{2} + 10^{2} + 16^{2} = 25 + 81 + 100 + 256 = 462$

c. ∑mf means to sum all elements as the product of the elements of m and f = (12×5) + (15×9) + (20 $(12^{2}(5)) + (15^{2}(9)) + (20^{2}(10)) + (30^{2}(16)) = 21145$ 10) + (30×16) = 875

d. ∑ $m^{2}f$ means to sum all elements as the product of the square of m and f = $((12*12)(5)) + ((15*15)(9)) + ((20*20)(10)) + ((30*30)(16)) = 21145$