Answer: c=4
Step-by-step explanation: the answer is 4 because c=4 and that is what c is.
For sake of convenience, reverse the series, then it would be:
21,19,17.....7
a=21, d = -2,
s(4) = 4/2 (21+15)
s(4)=2(36)
s(4) = 72
Answer: 3
Step-by-step explanation:
- The sample space is {H,T}.
- The one of the possible event is head
- The probability of that event is 50%.
<u>Step-by-step explanation</u>:
- Probability is a numerical description of an event to occur or how likely it is that a proposition is true.
- The set of all possible outcomes is called a sample space and the possible ordered outcomes are listed as elements in the set.
Suppose you toss a fair coin having two sides head and tail.
The sample space s = {H,T}
One of the possible events occur will be head ( or tail)
The probability of that event will be 50% because the tossed coin either shows the head or tail.
