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The trick is to know whether you should be reading your totals going down or across. We will be discussing this possibility carefully for the first question in the group.
In the meantime, letter the questions from A to H
A
A is the first member of a group of 5 where you read going down. You know this because you are give the gender first and then you want the total of the people (boys and girls) who participate in this activity.
So for A you have 8 boys who will choose swimming out of 17 (the rest of course are girls).
P(boy if swimming is the activity) = 8/ 17 = 0.47
B
P(girl if the activity is sports) = 7/27 = 0.26 Did you catch on that you were reading down?
C
P(Girl if the activity is reading) = 4/6 = 0.67
D
P(Boy if the activity is sports) = 20/27 = 0.74
E
This is the first question of the second group. Here you will get your totals by reading across. The reason is that you are given the activity, now you must supply the gender from the total number of people in the group of either boys or girls.
P(Swimming given that it is a girl) = 9/20 = 0.45 In other words you know you area working with girls. What you need to declare is the probability of what these girls will choose.
F
P(probability of reading if it is a boy) = 2/30 = 0.07 Think very carefully how these answers are derived. It's all a matter of reading which total to take and why. In this case you are taking the total number of boys and how many of them are doing the activity.
G
P(Swimming if a Boy) = 8/30 = 0.27
H
P(reading if a girl) = 4/20 = 0.2
Very interesting question. You'll learn a lot if you consider which comes first and what that means.
FOLLOW ME FOR CLEARING YOUR NEXT DOUBT
Answer:
AC = XY
Step-by-step explanation:
A triangle is a polygon with three sides and three angles. The types of triangles are scalene triangle, equilateral triangle, right angled triangle and obtuse triangle.
Two triangles are said to be congruent if all the three sides and three angles of one triangle is equal to the three sides and three angles of the other triangle.
In Δ ABC and ΔXYZ ,∠B=∠X=90. This means that triangle ABC and triangle XYZ are right angled triangle since one of their angles is 90 degrees.
The hypotenuse is the side opposite to right angle (90 degrees).
Therefore AC is the hypotenuse of triangle ABC and YZ is the hypotenuse of triangle XYZ.
If the hypotenuse and one leg of a right angled triangle is equal to the hypotenuse and leg of another right angled triangle, then the two triangles are congruent by RHS rule.
Since BC = XY, for Δ ABC congruent to ΔXYZ by R.H.S condition, the hypotenuse have to be equal, i.e. AC = XY
<em>The result is -13</em>
<h2>
Explanation:</h2><h2 />
Here we have the following addition problem:
So let's solve this step by step:
Step 1. Perform two plus two.
So:
Step 2. Perform the subtraction.
Since the sign (-) accompanies 17 which is greater than 4, then we perform the subtraction and add the sign (-) to the result. So:
<em>Finally, the result is -13</em>
<h2>Learn more:</h2>
Distributive property: brainly.com/question/10794694
#LearnWithBrainly
Answer:
0
Step-by-step explanation:
x = 5
5 - 5 = 0
this should
be right
