#5036 Daily Warm-Ups: Nonfiction Reading
128
©Teacher Created Resources
Warm-Up
Check Your Understanding
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4
Name ______________________________________________
1.
What are the odds that two of your classmates will share a birthday if you have twenty-three
people in your class?
a. 50-50
c. 2 in 3
b. 1 in 10
d.
no chance
2.
From the context of the passage, what is the best meaning of
odds?
a. unlikely to happen
c.
certain to occur
b. likely to occur
d.
chances of happening
3.
Based on the information in the passage, what are the odds of two members in a family of seven
having a birthday a week apart from each other?
a. The passage doesn’t say.
c. 1 in 10
b.
50-50
d. 2 in 7
4.
From the context of the passage, what is the best meaning of
50-50?
a. one chance in 50
b. one chance in two
c.
no chance of happening
d. one half of two
What are the
odds that two of your classmates
will share a birthday on the same month and
day? Of course, if you had over 366 people in
your class, the answer would be obvious! If
they were the same age, they would share the
same year, as well.
However, far fewer people are needed to
have a very good chance of sharing the same
birthday.
The chances are 50-50, or one
in two, that two people will share the same
birthday in any group of twenty-three people.
So if your class has twenty-three or more
students, the chances are quite good that two
classmates will have the same birthday. A
group of only fourteen people have a 50-50
chance of having two people with a birthday
only one day apart. And in a group of only
seven people, there is a 50-50 chance of
having two people with birthdays only one
week apart.
To test the odds, make a chart to see how
many of your classmates have birthdays on the
same day.
Remember, you have one chance
in two of finding the same days. The odds are
better, of course, if you survey two or more
classes. For fun, check with your extended
family to see if anybody shares dates.
Did You Know?
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