In a class of 20 students:
1 answer:
The Venn diagram is given below. Then the number of students who have brother and sister will be 6.
<h3>What are sets?</h3>A set is a group of clearly specified components. The number of items in a finite set is denoted by a curly bracket.
In a class of 20 students:
11 have a brother, 9 have a sister, and 6 have neither.
Then the Venn diagram will be
11 – a + a + 9 – a = 20 – 6
20 – a = 14
a = 6
The Venn diagram is given below.
More about the sets link is given below.
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The answer is in the image and this question is from exponents
Answer:
The expected number of wins for the player is 2.31
Step-by-step explanation:
No. of face cards = 12
total cards = 52
Probability of getting face card =
Probability of getting face card =
The player plays 10 times
Formula :
n = no. of trials = 10
p = probability of success=
E=expected number of wins
So, the expected number of wins for the player is 2.31