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Fractions and Percentages

Simulation using the 8 steps model

John decides to set up a music group with his even best friends. The group will work only if at least five of his friends can join. Using simulation, answer the following: 1. If John thinks that there is a 50% chance that each of his friends will join the group, can you estimate the probability of getting at least five frien

One equality

Hello! The attached file is the answer an OTA gave me to a problem I was having. There is one line in the reasoning I do not understand, and I have highlighted it in red. I would be very grateful if someone could explain it to me.

Circle (pie) graph and percentages

Construct a circle graph, with sectors given in percent, to represent the data in the given table. Favorite Restaurant Style / Number of Responses Chinese/ 138 Indian/ 90 Mexican /144 Thai/ 108 Answer the question appropriately. How many people were surveyed?

Circle graph and percentage

Use the circle graph to solve the problem. A survey of the 8263 vehicles on the campus of State University yielded the following circle graph. motorcycles 9% concertibles hatchbacks 16% 35% vans 7%

Calculating the percentage change in an algebraic word problem.

A consumer information magazine estimates that the real juice content of several drinks sold as snack drinks for children was 79.5% in 1999, compared to 86.25% in 1998. The percentage change in real juice content is: a. -7.83% b. -6.75% c. 6.75% d. 8.5%

Understanding sequencing and fraction differences.

Context: It would normally follow on from work on sequences and fractions Question: Ruth was investigating fraction differences. She wrote down this sequence of fractions: 1/1, 1/2, 1/3, 1/4, 1,5 1,6 ... ... Then she worked out the difference between the consecutive fractions: 1/2, 1/6, 1/12, 1/20, 1/30, .. .. Sh