MUST ANSWER NOW Letters are sent by second class post unless they are
marked first class.
Over a long period of time it has been established that
50% of letters to be posted are marked first class.
In a random selection of 12 letters to be posted,
find the probability that the number marked first class is
(a) at least 2.
(b) fewer than 10.

a

step-by-step explanation:

the best buy, is the 4- kilogram bag of lollipops for $18.40.

step-by-step explanation:

i found my answer by dividing the cost of each bag by their respective weights.

14.88 divided by 2 = 7.44

17.29 divided by 3 = 5.77

18.4 divided by 4 = 4.6

24.4 divided by 5 = 4.88

by this, i found that the 4 kilo bag is the best buy.

the answer is  

c.

90.0π cm^2

hope you got it.