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Cliff has a bag of tennis balls. 8 are green, 7 are yellow and 5 are white. He picks a tennis ball at random. What is the probability that he picks one that is not green?

To solve this question, we need to know how many balls there are altogether in Cliff's bag. In total, there are 20 balls (8+7+5). We know that 8 of the balls are greens, so by subtraction (20...

KS
Answered by Kabilan S. Maths tutor
5149 Views

The angles of a triangle are a, 2a and 2a + 30. Work out the value of a.

The areas of a triangle add up to 180 degrees. Therefore to tackle this question you must use algebra as you know that the sum of a, 2a and 2a + 30 is 180. a + 2a + 2a + 30 = 180 All the like terms can be...

AG
Answered by Amy G. Maths tutor
4172 Views

Write 40 as product of prime factors

Prime numbers are those that only have two factors, the number itself and 1. The two factors cannot be the same. E.g. 2 is a prime number but 1 is not.A prime factor is when a prime number is a factor of ...

MA
Answered by Maariya A. Maths tutor
26100 Views

A drawer contains ten identical yellow socks, eight identical blue socks and four identical pink socks. Amrita picks socks from from the drawer without looking. What is the smallest number of socks she must pick to be sure that she has at least two pairs

(question continued): of matching socks? A) 5 B) 6 C) 8 D) 11 E) 13
Answer: Try applying each number starting from the smallest, you will find that with 6 socks there will always be at least 2 pairs...

VB
Answered by Virginia B. Maths tutor
5198 Views

Nine-thousand five-hundred and forty-two people attend a pop concert. Round this number to the nearest hundred.

Answer: nine-thousand five-hundred (9,500)
There are 9 thousands, 5 hundreds, four tens and 2 units. We need to round the hundreds and the answer we have in 5 hundreds. Because of there being 5 hundr...

AW
Answered by Alexandra W. Maths tutor
3355 Views

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