State true or false
37 people have their birthdays before October.
True
False
Number of people who have their birthdays before October = Number of people who have birthdays from January to September
= 12 + 7 + 18 = 37
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.
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.
The number of ways so that the birthdays of 6 people falls in exactly 3 calendar months is