PLEASE HELP ME WITH THESE QUESTIONS!! :((( #2 & 4a)

2 a. 210 ways

b. 50 ways

c. 28 ways

d. 0.205

4 a. 1716 ways

Step-by-step explanation:

2. a. The number of ways, of selecting without restriction is given as follows;

= 10!/(4!(10 - 4)!) = 210

b. The number of ways of selecting 3 boys from 5 is 5!/(3!(5 - 3)!) = 10 ways

The number of ways of selecting the remaining 1 girl from 5 = 5!/(1!(5 - 1)!) = 5 ways

The number of ways of the selection where there must be three boys = 5×10 = 50 ways

c. Given that Maggie and Marley must be chosen, each of whom can be chosen only one way, we have;

Selection of 2 from 8 gives;

8!/(2!(8 - 2)!) = 28

Therefore, the number of ways of the selection where there must be Maggie and Marley is 28 × 1 × 1 = 28 ways

d. The probability of no boys is given by the relation;

P(k success from n trials) =

Where n = number of persons = 10

k = Number of person in the group = 4

p = Probability of success of girls = 1/2

Therefore, we have for no boys;

4a) The number of ways of selecting 9 softball players from 15 where Rylea and Emily must be included;

Given that Rylea and Emily are already selected, we have;

The number of ways of selecting 7 softball players from 13 given as follows;

13!/(7!(13 - 7)!) = 1716 ways

Given that Rylea and Emily can both be selected in only one way, the total number of ways = 1×1×1716 = 1716 ways

6,250

step-by-step explanation:

to get the area, multiply 360 by 160.(57,600)

to find out how many bags of fertilizer it will take, first figure out how many square feet one bag can hold. divide 1000 by 8(125) to get the unit rate(how many square feet one pound of fertilizer can hold)and multiply it by 50(6250). if i haven't made a mistake, that is the answer.

the area of the rectangle is 35units^2.

step-by-step explanation:

graph it and find the distance.

it is a 5*7 rectangle.

therefore the area is 35units^2.