Zombie-Outbreak Probability

1. 1.

   The bowl holds these ten sweets. One is picked at random. What is the probability it is a toffee (the wrapped sweet)?

   

   A1/2B1/5C3/10D1/10
2. 2.

   From the same bowl of 10, what is the probability that the pick is not a chocolate?

   A1/5B4/5C2/10D3/5
3. 3.

   From the same bowl of 10, what is the probability of picking a lollipop or a chocolate?

   A1/5B3/5C1/2D1/6
4. 4.

   A sweet is picked from the bowl of 10 and put back, 40 times. How many toffees would you expect?

   A10B20C8D25
5. 5.

   A fair spinner has eight equal sections, shown in order. What is the probability of landing on a bat?

   

   A1/8B3/8C2/6D1/4
6. 6.

   The same spinner is spun 120 times. How many times would you expect a ghost?

   A45B40C30D15
7. 7.

   The shaded part of the bar shows the fraction of a party bag that is chocolate. What is the probability of picking a chocolate from the bag, in simplest form?

   

   A3/12B1/4C1/3D3/9
8. 8.

   Two sweets are picked from the bowl of 10, with replacement. What is the probability that both are toffees?

   A1/2B1C1/4D1/8
9. 9.

   Two sweets are picked with replacement. What is the probability of a chocolate first and then a lollipop?

   A1/2B3/50C5/10D6/10
10. 10.

    The probability of rain on Halloween night is 0.3. What is the probability that it does not rain, as a fraction?

    A3/10B1/3C1/7D7/10
11. 11.

    In a zombie escape game each player has a 2/5 chance of escaping. If 60 people play, how many would you expect to escape?

    A36B12C24D30

Zombie-Outbreak Probability — Answer key

1. 1.A — 1/2
   2.B — 4/5
2. 3.C — 1/2
   4.B — 20
3. 5.D — 1/4
   6.A — 45
4. 7.B — 1/4
   8.C — 1/4
5. 9.B — 3/50
   10.D — 7/10
6. 11.C — 24