Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 10th
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A purse contains 10 notes of ₹ 2000, 15 notes of ₹ 500, and 25 notes of ₹ 200. One note is drawn at random. What is the probability that the note is either a ₹ 500 note or ₹ 200 note? - Mathematics

MCQ

A purse contains 10 notes of ₹ 2000, 15 notes of ₹ 500, and 25 notes of ₹ 200. One note is drawn at random. What is the probability that the note is either a ₹ 500 note or ₹ 200 note?

Options

  • `1/5`

  • `3/10`

  • `2/3`

  • `4/5`

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Solution

`4/5`

Explanation;

Hint:

Sample space (S) = 10 + 15 + 25 = 50

n(S) = 50

Let A be the event of getting ₹ 500 note

n(A) = 15

P(A) = `("n"("A"))/("n"("S")) = 15/50`

Let B be the event of getting ₹ 200 note

n(B) = 25

P(B) = `("n"("B"))/("n"("S")) = 25/50`

Probability of the note is either a ₹ 500 note or ₹ 200 note

P(A) + P(B) = `15/50 + 25/50`

= `40/50`

= `4/5`

Concept: Probability
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APPEARS IN

Samacheer Kalvi Mathematics Class 10 SSLC Tamil Nadu State Board
Chapter 8 Statistics and Probability
Exercise 8.5 | Q 15 | Page 332
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