IGCSE Mathematics Paper-1: Specimen Questions with Answers 110 - 112 of 324
Question 110
Write in Short
Short Answer▾The surface area of the Saturn is 42 700 000 000 . Write this number in standard form.
Explanation
Here,
(a) The surface area of the Saturn is 42 700 000 000
So, standard from will be:
Question 111
Write in Short
Short Answer▾(a) Merry changed into dollars when the rate was . How many dollars did she receive?
(b) Write 5.28769 correct to 3 significant figures.
Explanation
Here,
(a) Merry changed into dollars when the rate was .
So,
Then
she received.
(b) 5.28769 correct to 3 significant figures means there will be total of 3 digits:
So, we will get 5.29 because after digit 8 there is 7 which is greater than 5, so 8 will get round up and be 9.Question 112
Describe in Detail
Essay▾(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 =