Question

Please can show me step by step

Answer 1

Step-by-step explanation:

sample space={30,31,32.......98,99}

multiple of three={30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99}

n(a)=24

greater than 70={71,72,73...99}

n(b)=29

answer

a=24/70

b=29/70

Answer 2

1) Condition for winning a pen
The slip should have number more than 70
Number from 70 to 99= 29
Probability of winning a pen = 29/69

2)Condition for winning a lunch box
The slip should have number which is multiple of 10
Number of multiples of 10 from 30 to 99= 8
Probability of winning a lunch box= 8/69

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