A student has a bag of marbles. There are 5 pink, 7 red, 12 green, 2 blue, and 4 black marbles in the bag. Calculate the theoretical probability of picking a green marble.(1 point)
Responses
25
Start Fraction 2 over 5 End Fraction
1
1
720
Start Fraction 7 over 20 End Fraction
3
Start Fraction 12 over 30 End Fraction
= 2 over 5
Emma has a bag of marbles. There are 9 pink, 5 red, 8 green, 2 blue, and 6 white marbles in the bag. Calculate the complement of not picking a pink marble.(1 point)
Responses
310
Start Fraction 3 over 10 End Fraction
37
Start Fraction 3 over 7 End Fraction
1
1
710
The complement of not picking a pink marble is picking a marble that is not pink. Therefore, it is the sum of red, green, blue, and white marbles.
Complement = 5 (red) + 8 (green) + 2 (blue) + 6 (white) = 21
Therefore, the complement of not picking a pink marble is 21 marbles.
310
A student demonstrates probability by using a 6-sided number cube with numbers 1, 2, 3, 4, 5, and 6. The student rolls the number cube 246 times. Predict how many times a 3 or 5 will be rolled.(1 point)
Responses
164 times
164 times
123 times
123 times
41 times
41 times
82 times
The probability of rolling a 3 or 5 on a 6-sided number cube is 2 out of 6, or 1/3.
To predict how many times a 3 or 5 will be rolled in 246 rolls, we multiply the probability by the number of rolls:
246 * 1/3 = 82 times
Therefore, the predicted number of times a 3 or 5 will be rolled is 82 times.
82 times