An ice cream vendor sells three flavours: chocolate, strawberry and vanilla. 45% of the sales are chocolate, 30% are strawberry and the rest are vanilla. Sales are by the cone or the cup. The percentages of cones sales for chocolate, strawberry and vanilla are 75%, 60% and 40%, respectively. For a randomly selected sale find the probability that the ice cream was sold in a cup and the flavour was strawberry. (2DP)数值题

登录即可查看完整答案

我们收录了全球超50000道真实原题与详细解析,现在登录,立即获得答案。

类似问题

A fair coin and a fair die are tossed. The probability of the event 'head and a number greater than 2 ' is:

Question text Guidelines to answer the following question: Fill in the blanks with the correct answers. Do NOT use any spaces or brackets. For all numerical answers, give EXACT values (i.e. do not round your answers) unless instructed otherwise in the question. If using fractions, give answers as SIMPLIFIED fractions using the forward slash (e.g. 1/2 or 5/4). Use - for any negatives. ______________________________________________________________________________________________ This question is worth 4 + 1 + 2 + 4 = 11 marks. Charlie exercises each week by going to the gym and doing yoga. Let event [math: G] be that he goes to the gym and event [math: Y] be that he does yoga. It is known that [math: Pr(G)=0.65], [math: Pr(Y)=0.40] and [math: Pr(G∩Y)=0.30] a. Complete the following probability table representing this information. Give all values to 2 decimal places. (4 marks) [table] | G | G' | Total Y | Answer 1 Question 6 | Answer 2 Question 6 | Answer 3 Question 6 Y' | Answer 4 Question 6 | Answer 5 Question 6 | Answer 6 Question 6 Total | Answer 7 Question 6 | Answer 8 Question 6 | 1 [/table] b. Using your table, state the probability that in a particular week, Charlie does Yoga but not gym. Answer: Answer 9 Question 6[input] (1 mark) c. Calculate the probability that Charlie goes to yoga, given that he goes to the gym. Complete the following by filling in numerical answers, and give your final answer correct to 2 decimal places. Pr[math: (Y|G)] [math: =] Answer 10 Question 6[input] [math: ÷] Answer 11 Question 6[input] [math: =] Answer 12 Question 6[input] (2 marks) d. Charlie is also a member of a local running club, which has a total of 200 members. The club do a survey of the additional fitness activities undertaken by their members, with the following results. Pr(G) = 0.72 Pr(Y) = 0.15 Pr(G ∩ Y) = 0.09 where G represents going to the gym, and Y represents going to yoga. (4 marks) i. How many members do yoga? Answer: Answer 13 Question 6[input] ii. Show the equation to find the probability the members going to the gym, yoga or both. Answer 14 Question 6[select: , Pr(G), Pr(Y), Pr(G ∩ Y), Pr(G U Y)] [math: =] Pr(G) [math: +] Answer 15 Question 6[select: , Pr(G), Pr(Y)] [math: −] Answer 16 Question 6[select: , Pr(G), Pr(Y), Pr(G ∩ Y), Pr(G U Y)] iii. Calculate the probability that a randomly selected member goes to the gym, yoga or both. Answer: [math: Pr(gym,yoga,orboth)=] Answer 17 Question 6[input]

A fair coin and a fair die are tossed. The probability of the event 'tail and a number less than 4' is:

Suppose that 57% of the swimmers in a club are female (F), that 32% of the swimmersin the club swim butterfly (B), and that 11% of the swimmers in the club are femaleand swim butterfly. Which of the following probability tables correctly summarises thisinformation?

更多留学生实用工具

加入我们，立即解锁 海量真题 与 独家解析，让复习快人一步！