Open Up - Grade 7 - Mathematics - Unit 8 - Lesson 4
By Formative Library
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Last updated about 3 years ago
6 Questions
1 point
1
Question 1
1.
A carnival game has 160 rubber ducks floating in a pool. The person playing the game takes out one duck and looks at it.
If there’s a red mark on the bottom of the duck, the person wins a small prize.
If there’s a blue mark on the bottom of the duck, the person wins a large prize.
Many ducks do not have a mark.
After 50 people have played the game, only 3 of them have won a small prize, and none of them have won a large prize.
Estimate the number of the 160 ducks that you think have red marks on the bottom.
7.NS.2.d
7.SP.6
7.SP.5
7.SP.7.b
5.NBT.3.a
1 point
1
Question 2
2.
A carnival game has 160 rubber ducks floating in a pool. The person playing the game takes out one duck and looks at it.
If there’s a red mark on the bottom of the duck, the person wins a small prize.
If there’s a blue mark on the bottom of the duck, the person wins a large prize.
Many ducks do not have a mark.
After 50 people have played the game, only 3 of them have won a small prize, and none of them have won a large prize.
Then estimate the number of ducks you think have blue marks.
7.NS.2.d
7.SP.6
7.SP.5
7.SP.7.b
5.NBT.3.a
1 point
1
Question 3
3.
Lin wants to know if flipping a quarter really does have a probability of \frac{1}{2} of landing heads up, so she flips a quarter 10 times. It lands heads up 3 times and tails up 7 times.
Has she proven that the probability is not\frac{1}{2} ?
7.NS.2.d
7.SP.6
7.SP.5
7.SP.7.b
5.NBT.3.a
1 point
1
Question 4
4.
A spinner is spun 40 times for a game. Here is a graph showing the fraction of games that are wins under some conditions.
Estimate the probability of a spin winning this game based on the graph.
7.NS.2.d
7.SP.6
7.SP.5
7.SP.7.b
5.NBT.3.a
1 point
1
Question 5
5.
Which event is more likely: rolling a standard number cube and getting an even number, or flipping a coin and having it land heads up?
7.NS.2.d
7.SP.6
7.SP.5
7.SP.7.b
5.NBT.3.a
1 point
1
Question 6
6.
Noah will select a letter at random from the word “FLUTE.” Lin will select a letter at random from the word “CLARINET.”
Which person is more likely to pick the letter “E?”
7.NS.2.d
7.SP.6
7.SP.5
7.SP.7.b
5.NBT.3.a
"Source: Open Up Resouces (Download for free at openupresources.org.)"