What happens when you add complementary fractions together

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Reference no: EM134016157

Assignment:

1. Return to the closing stock prices per share for eight recently traded stocks from a portfolio, with five closing higher and the others did not. What is the probability a randomly selected stock from this portfolio did not close higher in recent trading? Again, express the answer as a fraction, written horizontally:

2. Now express this complementary probability for the chance a stock did not close higher as a percentage, without rounding but include the percent symbol.

3. Notice what happens when you add the complementary fractions together? What happens when you add the complementary percentages together? What amount do you get? The total or the whole, yes!?

Agree or disagree?

4. When you added the two complementary fractions in the closing stock prices examples, you get ... one or 1, agreed?

5. When you add the complementary percentages together, what percentage do you get? Report it with the percent symbol without any insignificant digits.

6. A probability is compound if it considers at least two events or outcomes at the same time.

Returning to the closing stock prices example, if five stocks closed higher and one stock closed unchanged in the portfolio of eight stocks after recent trading, what is the probability that the stock closed either higher or unchanged? That would be a compound event, selecting a stock that closed either higher or unchanged. Agreed?

7. Now, continuing with this example with closing stock prices example when five stocks closed higher and one stock closed unchanged in the portfolio of eight stocks after recent trading, determine that probability for randomly selecting a stock that closed either higher or unchanged after recent trading. Express the answer as a percentage, including percent symbol but without insignificant digits.

8. How did you compute the previous answer for the probability of randomly selecting a stock from a portfolio that either closed higher or closed unchanged after recent trading? What did you do with the individual or simple probabilities for stocks that closed higher and stocks that closed unchanged? Describe your arithmetic operation in a single, three-letter word. Two words could work that are associated with an arithmetic operation that is not subtraction, multiplication or division. Now you got it? Report only one of the two words, your choice, all lower case letters. You got this!

9. Therefore, continuing with this example with closing stock prices example when five stocks closed higher and one stock closed unchanged in the portfolio of eight stocks after recent trading, determine that probability for randomly selecting a stock that closed neither higher nor unchanged after recent trading. Express the answer as a percentage, including percent symbol but without insignificant digits.

10. As a reminder, when you add together the probability of an either or event along with the probability of its corresponding neither nor event, you get 100%.

Agree or disagree?

Reference no: EM134016157

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