The letters of the word mathematics are written of pieces of paper and placed in a hat. a slip of paper is drawn from the hat. find each of the following probabilities without replacing the letters. 1. p(m or a then c)

4/11, then 1/10

Step-by-step explanation:

11 letters in Mathematics, 4 are Ms or As. 4/11

now, after 1 has been taken out, it cant be put back in. "...without replacing the letters."

10 letters left after 1 has been taken out. 1 is a C. 1/10

BOOM! MaThEmAtIcS :P

Number of members chosen by Helena in her homeroom = 5

Mean number of tickets = 16

So, total candidates who had purchased ticket = 16 × 5= 80

Now, number of candidates chosen randomly = 10

So, total candidates who had purchased ticket = 22.5 × 10=225

No, one sample can't be a better representation by choosing randomly a group of members.

In Sample 1 , we are considering only 5 drama numbers.

And In Sample 2, we are considering 10 random samples among 75 members.

The mean in two cases varies by (22.5-16=6.5) which is large because we are considering number of tickets sold by members of club.

It would have been better if she has taken more than 3 random samples of 15  students ,among 75 students, then she would have got appropriate mean or value near the mean.