# IGCSE Mathematics Paper-1: Specimen Questions with Answers 112 - 113 of 175

## Question number: 112

### Describe in Detail

(a) 85 % of the seeds will produce green flowers. One seed is chosen at random. Find probability that it will not produce a green flower?

(b) A box of 15 pencils has 5 red, 4 yellow and 6 blue pencils. One pencil is chosen at random from the box, calculate probability of

(i) Yellow, (ii) yellow or blue, (iii) green

### Explanation

Here,

(a) 85 % of the seeds in a packet will produce green flowers. So, probability of green flowers=

So, other flowers = .

Now, one seed is chosen at random, so probability of not produce a green flower = .

(b) A box of 15 pencils contains 5 red, 4 yellow and 6 blue pencils.

So, Probability of red pencils =

Probability of yellow pencils =

Probability of blue pencils =

## Question number: 113

### Write in Short

Grina plots a scatter diagram of speed against time taken. As the time taken increases, speed decreases. Which one of the following types of correlation will her scatter graph show?

Positive Negative Zero

### Explanation

Here, as the time taken increases, speed decreases, scatter diagram will be shown as below:

So, it shows the **negative correlation **because it shows the negative gradient.