Question

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?
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Answer 1

Answer:

5/4

Step-by-step explanation:

there are 25 notes of 200 and 15 notes of 500

so total outcome are (15+25)=40 and total notes are 50

aacording to formula 4/5

Answer 2

Answer:

Probability of the note is either a $Rs.\ 500$ note or $Rs\ 200$ note is $\frac{4}{5}$

Step-by-step explanation:

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

$\mathrm{n}(\mathrm{S})=50$

Let $A$ be the event of getting$Rs\ 500$ note

$\begin{aligned}&n(A)=15 \\&P(A)=\frac{n(A)}{n(S)}=\frac{15}{50}\end{aligned}$

Let $B$ be the event of getting $Rs\ 200$ note

$\begin{aligned}&n(B)=25 \\&P(B)=\frac{n(B)}{n(S)}=\frac{25}{50}\end{aligned}$

Probability of the note is either a $Rs.\ 500$ note or $Rs\ 200$ note

$\begin{aligned}&P(A)+P(B)=\frac{15}{50}+\frac{25}{50} \\&=\frac{40}{50} \\&=\frac{4}{5}\end{aligned}$