12. School guidelines require that there must be at least 2 chaperones for every 25 students going on a school trip. How many chaperones must there be for 53 students?

2 chaperones

27 chaperones

5 chaperones

4 chaperones

6

chaperones will be needed.

Step-by-step explanation:

1 to 25 students require (at least) 2 chaperones.

26 to 50 students require (at least) 4 chaperones.

51 to 75 students require (at least) 6 chaperones.

This is an example of use of the ceiling function.

The ceiling of a value  

x

(sometimes written as  

⌈

x

⌉

) is defined as the smallest integer greater than or equal to  

x

.

In the given example we are asked for

XXX

2

×

⌈

53

25

⌉

which is  

6

answ9x x 3=

step-by-step explanation:

amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation: