Open Up - Grade 7 - Mathematics - Unit 8 - Lesson 4

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.

Tags

7.NS.2.d

7.SP.6

7.SP.5

7.SP.7.b

5.NBT.3.a

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.

Tags

7.NS.2.d

7.SP.6

7.SP.5

7.SP.7.b

5.NBT.3.a

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.

Tags

7.NS.2.d

7.SP.6

7.SP.5

7.SP.7.b

5.NBT.3.a

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?

• The Coin is more likely
• The Number Cube is more likely
• Both are equally likely

Tags

7.NS.2.d

7.SP.6

7.SP.5

7.SP.7.b

5.NBT.3.a

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?”

• Noah is more likely
• Lin is more likely

Tags

7.NS.2.d

7.SP.6

7.SP.5

7.SP.7.b

5.NBT.3.a