A jar has 20 red jelly beans and 40 black jelly beans. If you pick a red jelly bean and put it back, what are the odds of picking a black jelly bean next? Question 18 options: D) 1 (100%) C) 40/60 A) 20/40 B) 20/60
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There are 20 red jelly beans and 40 black jelly beans. So, the total is: \[ 20 + 40 = 60 \text{ jelly beans} \] Show more…
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There are two identical jars on a table: Jar-A has exactly 380 red jelly beans, and Jar-B has exactly 380 black jelly beans. Suppose you took the scoop that holds exactly 20 jelly beans and filled it with 20 red jelly beans from A and put them into B. After shaking B to mix the jelly beans, scoop 20 jelly beans from B and put them into A. (a) Choose the correct statement from the following. 1) There are more red jelly beans expected in B than the black jelly beans expected in A. 2) There are more black jelly beans expected in A than the red jelly beans expected in B. 3) The number of red jelly beans expected in B and the number of black jelly beans expected in A are the same. 4) There is not enough information. (b) Either mathematically or in plain English, justify your answer.
Qudsiya A.
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1. [2 points] A jar on your desk contains twelve black, eight red, ten yellow, and five green jelly beans. You pick a jelly bean without looking. a. What is the probability that the jelly bean is red? Write your answer as a fraction. Answer (0.25 pt) 8/35 Explanation (0.25 pt) Number of red jelly beans/ Total number of jelly bean 12(black)+8(red)+10(yellow)+5(Green)= 35, and 8 are red 8/35 or 0.23 b. What is the probability that the jelly bean is not green? Write your answer as a fraction. Answer (0.25 pt) 6/7 Explanation (0.25 pt) The probability that the Jelly bean is not green/ Total Number of jelly beans=35 (-5 green)= 30/35 Simplified (5 goes into 30 6 times/ 5 goes into 35 7 times) or 0.86 c. What are the odds against picking a yellow jelly bean? Answer (0.5 pt) Explanation (0.5 pt)
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