Math Question: 2) In a batch of 10 plants, 3 have pink flowers. If I pick 1 flower at random, what is the probability it is pink? 3) 25 out of 30 students love maths. If I pick 1 student at random, what is the probability they love maths? 4) Joshua rolls an ordinary die once. Write down the probability that he gets: a) a 6, b) an odd number, c) a number less than 3, d) an 8. 5) Emily has a bag of 20 fruit flavour sweets. 7 of the sweets are strawberry flavour, 11 are lime flavour, 2 are lemon flavour. Emily takes at random a sweet from the bag. Write down the probability that Emily: a) takes a strawberry flavour sweet, b) does not take a lime flavour sweet, c) takes an orange flavour sweet. 6) (a) Natasha says the probability that she will be late for school next Monday is 1.5. Natasha is wrong, explain why (b) Bryan plays a game. The probability that he will win the game is 0.7. Write down the probability that Bryan will not win the game. 7) A bag contains red, blue and green counters. A counter is drawn at random from the bag. The probability that it is red is 0.4. The probability that it is blue is 0.25. a) What is the probability that it is green? b) There are 80 counters in the bag. How many of them are blue? ? 8) Jana often has to cross a railway at a level crossing. Over a period of time Jana kept a record of whether or not she had to stop at the crossing. Frequency Stop 13 Not stop 27 Jana uses the crossing 500 times in a year. About how many times will she expect to stop? 9) The probability that a biased dice will land on a six is 0.4. Marie is going to throw the dice 400 times. Work out an estimate for the number of times the dice will land on a six. 10) The probability of an event happening is denoted by P(A). The probability of an event not happening is denoted by P(A’). Here are some probabilities: P(A) = 0.16 P(B’) = 0.42 P(A) + P(B) + P(C) = 1 Find: (a) P(A’) (b) P(B) (c) P(C) (d) P(C’) 11) Ken rolls a die 60 times. This die also has six faces, and the table gives information about Ken’s scores. Score on die Frequency 1 9 2 11 3 20 4 2 5 8 6 10 Explain what you think about Ken’s die.

Asked By isha On 03/30/2020 06:02