Answer:
the answer is 40 boys
Step-by-step explanation:
Let's say there are x boys who play both cards and carrom.
We setup up an equation that involved all information given and x.
Boys who only play cards = 45-x
Boys who only play carrom = 20-x
Boys who play both = x
Add there together and you should get 60, which is the total number of students in the class.
(45-x)+(20-x)+x=60
65-x=60
x=5
Boys who only play cards=45-x=45–5=40
hope it helps you
Answer:
x
=
1
+
3
i
,
1
−
3
i
Step-by-step explanation:
<u>answers to 1 - 4:</u>
1.<em> </em><em>GCF: </em>2
2. <em>GCF:</em> 3
3. <em>GCF : </em>7
4.<em> GCF:</em> 3
Answer:
a.0.3020
Step-by-step explanation:
For each student, there are only two possible outcomes. Either they have experienced feeling of math anxiety, or they have not. The students are chosen at random, which means that the probability of a student having experienced feelings of math anxiety is independent from other students. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which is the number of different combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening.
20% of the students have experienced feelings of math anxiety.
This means that
If you take a random sample of 10 students from this population, the probability that exactly 2 students have experienced math anxiety is
This is when
So the correct answer is:
a.0.3020