Question

Anu was checking her emails. She casually told her friend sitting next to her,
"The ratio of the unread emails to the read emails in my inbox is 4: 1. The total
number of emails in my inbox are 120." What was the number of unread emails in
her inbox
30
90
96​

Answer 1

Total e-mail = 120 e-mails

Ratio of unread e-mail = 4x

Ratio of read e-mail = x

According to question:-

Unread e-mails:

$= \frac{4x}{4x + x} \times 120$

$= \frac{4x}{5x} \times 120$

$= \frac{4 \times 24}{1}$

$= 96 \: e-mails.$

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Answer 2

Step-by-step explanation:

Given:-

The ratio of the unread emails to the read emails in my inbox is 4: 1. The total number of emails in my inbox are 120.

To find:-

Number of unread emails: Number of read emails=4:1

Let

Number of read emails=x

Number of unread emails=4x

ATQ

$\\ \tt{:}\longrightarrow number \: of \: unread \: emails + number \: of \: read \: emails = 120 \\ \\ \tt{:}\longrightarrow 4x + x = 120 \\ \\ \tt{:}\longrightarrow 5x = 120 \\ \\ \tt{:}\longrightarrow x = \frac{120}{5} \\ \\ \tt{:}\longrightarrow x = 24$

_________________________________________________________

$\\ \tt{:}\longrightarrow Number:of\:unread\:emails=4x$

$\\ \tt{:}\longrightarrow 4(24)=96$