Um cant figure out the second question

  £15

Step-by-step explanation:

There are 3 ways to get 7 out of the 12 possible outcomes, so the probability a player will win 30p is 1/4. That is a player will have expected winnings of (1/4)(30p) = 7.5p each time the game is played.

The school gains 20p from each player, but has an expected payout to the player of 7.5p, so the net gain per game to the school is ...

  20p -7.5p = 12.5p

The gain to the school when 120 people play is ...

  (120)(12.5p) = 1500p = £15 . . . . expected to be raised

answer: there are x+184 pages in olivia's book.

step-by-step explanation:

let the total number of pages in the book which olive has already read be x.

then if olive has 184 pages left to read, then the total number of pages are in olive's book= pages she has read+pages she has left to read

therefore, the total number of pages in olivia's book=

hence, there are x+184 pages in olivia's book.