Question

The sum of the probability of happening of an event or not happening is always same true or false with reason

Answer 1

❤️HEY MATE HERE'S YOUR ANSWER❤️
⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️⬇️

The sum of the probability of happening of an event or not happening is always same this is true because the probability of happening an event is always come between 0 to 1.

An example: You could define a probability distribution for the observation for the number displayed by a single roll of a die. The probability that the die with show a "1" is 1÷6.

That's because there are six possible outcomes, and only one of those outcomes is a "1". Lets label the probabilities of all the possible outcomes for the single die.

Roll a "1": Probability is 1÷6
Roll a "2": Probability is 1÷6
Roll a "3": Probability is 1÷6
Roll a "4": Probability is 1÷6
Roll a "5": Probability is 1÷6
Roll a "6": Probability is 1÷6

Each probability is between 0 and 1, the sum of all the probabilities: 
1÷6+1÷6+1÷6+1÷6+1÷6+1÷6=1, 
So by this we can say that when we want to get not happening event so we have to subtract it from 1
FOR EXAMPLE :
If we want to calculate the not happening event in first role so we have so subtract it from 1

1-1÷6
5÷6



❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️
✌️ HOPE✌️ IT ✌️ HELP✌️YOU✌️

✌️MARK✌️ IT ✌️ BRAINLIEST ✌️

THANKS