Answer: The P(e or f) is the P(e) + P(f) when they are disjoint events.
Disjoint events are events that are independent of each other.
Imagine rolling a die. The probability of rolling a 1 is independent of rolling a 2. Both of these probabilities are 1/6.
To find the probability of rolling either a 1 or 2, P(1 or 2) we simply add the 2 probabilities together.
As, cosecx, secx and cotx are just the reciprocals of sinx, cosx and tanx, when you multiply each corresponding pair you just get 1. This results in 1*1*1 giving a final answer of 1.
Answer:
Step-by-step explanation:
Answer:
216 boys
Step-by-step explanation:
450 students: 20% girls, 80% boys
450*20%=90 girls
450*80%=360 boys
Students having mobile phones: 40% (OF THE 90) girls, 60% (OF THE 360) boys
90*40%=36 girls
360*60%=216 boys
[We honestly don't need to care about the girls without mobile phones as they are only asking how many boys have mobile phones]
Answer:
The measurement justifies the perpendicular bisector theorem
Step-by-step explanation:
Mathematically, what the theorem is saying is that the distance AC is the same as the distance BC
This is because. the line joining both points is coming from the same external point which is on the bisector of the line joining the two points.
Hence, what we are sayingg here is that the lines coming from the point C which is a point on the perpendicular bisector of the line segment AC is equal for both end points on the line segment.
Thus, by measuring both lines, we can see that they are congruent and the triangle we have is an isosceles triangle