josephine noticed that out of 10 e - mails she received, 7 were advertisements. what can she predict about…

josephine noticed that out of 10 e - mails she received, 7 were advertisements. what can she predict about the number of advertisements she will receive in the next 100 e - mails?\nshe will receive 7 advertisements.\nshe will receive 10 advertisements.\nshe will receive 70 advertisements.\nshe will receive 90 advertisements.

josephine noticed that out of 10 e - mails she received, 7 were advertisements. what can she predict about the number of advertisements she will receive in the next 100 e - mails?\nshe will receive 7 advertisements.\nshe will receive 10 advertisements.\nshe will receive 70 advertisements.\nshe will receive 90 advertisements.

Answer

Explanation:

Step1: Calculate the proportion

The proportion of advertisement - emails in the first 10 emails is $\frac{7}{10}$.

Step2: Predict for 100 emails

Multiply the proportion by 100. Let $x$ be the number of advertisement - emails in 100 emails. Then $x=\frac{7}{10}\times100$. $x = 70$.

Answer:

She will receive 70 advertisements.