20. A teacher made a pack of 30 cards and numbered from I to 30. She asked one of the students to pick a card
What is the probability that that card picked is
i) an even number
ii) a cube number
ill) multiple of 7
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20. A teacher made a pack of 30 cards and numbered from I to 30. She asked one of the students to pick a card
What is the probability that that card picked is
i) an even number
ii) a cube number
ill) multiple of 7
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Step-by-step explanation:
(1) the probability that the card is an even number
=number of favourable outcome/ number of total outcome
=15/30
=1/2
(2) the probability that the card is a cube= 4/30
=2/15
(3) the probability that the card is multiple of 7= 4/30
=2/15
I hope this will help you
Answer:
Step-by-step explanation:
Given:
A pack of 30 cards numbered from 1 to 30
To find:
The probability that that card picked is:
Solution:
1. An even number
Total events=T(E)=30 ( cards)
Cards with even number are:
2,4,6,8--------------------------30 ( 15 cards)
So favoring events F(E)=15
Thus Probability P(E) =
2. A cube number:
Total events=T(E)=30 ( cards)
Cards with cube number are:
1,8,27 ( 3 cards)
So favoring events F(E)=15
Thus Probability P(E) =
3. A multiple of 7:
Total events=T(E)=30 ( cards)
Cards with multiple of 7 are:
7,14,21 ( 3 cards)
So favoring events F(E)=15
Thus Probability P(E)
Answers:
Concept used:
Probability P(E)