Find the sum of the first 4 terms
2, -8, 32, -128 are the first 4 terms
<em>2 + (-8) + 32 + ( - 128)</em>
2 + ( - 8) = -6
-6 + 32 = 26
-128 + 26 = -102
-102 is the sum of the first four terms
hope this helps
When you first pick a ticket, there are 2 winning tickets and 40 total tickets. This means that there is a 2/40 chance of your ticket being a winning one. This fraction can be reduced to 1/20.
After this, there will be 1 winning ticket left and 39 total tickets. There is a 1/39 chance of the next ticket being a winning one. We multiply these two fractions together to get our answer. 1/20 * 1/39 = 1/780, so there is a 1/780 chance of having 2 winning tickets.
Answer:
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Step-by-step explanation:
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