2012/02/10

[問題] 給 S.5D 的 Assignment

The following picture is just for fun only...


有關同學(尤其是未領取工作紙的同學),可先預留位置,題目詳見如下:

Q1
In a pond, the number of orange goldfish is 8 more than that of black goldfish. If a goldfish is selected from the pond randomly, the probability of selecting a black goldfish is seven over eighteen. How many black goldfish are there in the pond?

Q2
A four-digit number is formed by arranging 1, 2, 3 and 5 randomly without repetition. Find the probabilities of the following events.
(a) The thousand digit of the number is 1.
(b) The number is an odd number.

Q3
A number is selected at random from the integers 1 to 40 inclusive. Find the probabilities of getting a multiple of 5 or 9.

Q4
A letter is chosen from the words THIRTY and EIGHT each. Find the PROBABILITY of choosing two vowels.

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