(b) Will plays a game at the theme park. There are 20 cards numbered from 1 to
20.
Will takes a card at random.
He wins if the card he chooses shows a
prime number.
Work out the probability that Will wins.
Give your answer as a fraction in its
simplest form.

what is the original number? you forgot to add it.

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5