Class $8$ students did a survey on birthdays. This chart shows the number of people with birthdays in each three months of the year. $A)$ From the chart, how many people have a birthday before July? $B)$ How many people have a birthday in December if nobody has a birthday in October and six people have a birthday in November.

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Solution

$A)$ Number of People with birthday before July $= 12$ people in Jan-Feb-March $+ 7$ people in April May June $= 19$
$B)$ Total number of people with birthday in the months of Oct, Nov, and Dec $= 14$

In which $0$ have a birthday in October and $6$ in Nov.

So, number of people with birthday in Dec $= 14 - 6 = 8.$

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Similar questions

Class 8 students did a survey on birthdays. This chart shows the number of people whose birthdays fall on different months of the year.

A) How many people have their birthdays before July?

B) How many people have their birthdays in December if nobody has their birthdays in October and six people have their birthdays in November.

State true or false

37 people have their birthdays before October.

The probability that in a group of 3 people, at least two will have the same birthday is:

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