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Probability and statistics Flashcards | StudBud
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Probability and statistics
Probability and statistics
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1
What is the probability of rolling a four dice and getting a 6 on all of them?
(\frac{1}{6})^4
\frac{4}{6}
2
A combination is 6 items long using letters A, B or C. The letters can be repeated. What is the number of combinations?
36
63
3
A tree diagram for picking marbles. What type of event does this tree diagram show?
dependent
independent
4
You flip a coin twice and want to get heads. Are these independent or dependent events?
dependent
independent
5
Formula: Probability =
\frac{possible}{favourable}
\frac{favourable}{possible}
6
A tree diagram for picking green and blue marbles. What is the probability of picking green first and then blue?
28/110
11/110
14/55
7
Formula: P(A or B) =
P(A) + P(B)
P(A) / P(B)
P(A) x P(B)
P(A) - P(B)
8
What is the probability of getting a red and blue?
1/10
1/5
5/15
5/50
9
A combination is 5 digits long using 0-5. No numbers can be repeated. What is the number of calculations?
64
6 x 5 x 4 x 3
10
What is the probability of picking a red or blue marble?
8/100
8/20
8/10
4/5
11
What type of event does this tree diagram show?
dependent
independent
12
Formula: P(A and B) =
P(A) x P(B)
P(A) / P(B)
P(A) + P(B)
P(A) - P(B)
13
What is the mean?
7.2
9
1
1.6
14
A tree diagram for picking blue and green marbles. What is the probability of getting green first and then blue?
4/5
1/25
8/10
4/25
15
Which is
more
likely to happen: rolling a six on a dice or flipping a heads on a coin?
flipping a heads on a coin
rolling a six
16
What is the range?
11
4
17
Number of expected outcomes = probability X repeats
. You spin this pointer 30 times. How many times should you get a 2?
30
20
10
5
18
Use a PEN and PAPER to answer. What is the probability of picking a marble of each colour?
8/25
1/25
16/25
4/25
19
What is the probability of getting a red or green?
4/10
2/5
5/10
4/15
20
What is the relative frequency for 1 sibling?
22%
52%
21
What is the probability of getting a 2 at least once if the spinner is spun two times?
\frac{49}{64}
\frac{15}{64}
\frac{14}{64}
\frac{50}{64}
22
What is the median?
2
3
0
1
23
You want to get a 2. What is the complementary event?
Getting a 1 or a 3
Getting any other number
Getting a 6
24
You want to get a 10 of hearts. You take one card, check it, do NOT replace it, then take another card.
independent
dependent
25
What is the number of people asked how many siblings they have?
20
22
23
21
26
What is the probability of picking a blue marble as the simplest fraction?
1/3
3/10
3/9
27
What is the mode?
0
3
1
2
28
Which is
least
likely to happen (picking a coloured marble from a bag)?
picking a green marble
picking a blue marble
picking a red marble
29
What is the probability of picking a red and blue marble?
17%
7%
70%
