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45 sequences. Make it easier and think what are the 2 tail flips. They are: 1-2; 1-3;1-4...1-10. That is 9 sequences starting with 1. There are 9 sequences starting with 2, 9 starting with 3, etc, up to 10. That makes 90 sequences, but since 1-2 is the same as 2-1, ie order doesn't matter, divide that in half to get 45.
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How many heads does a pig have?
a normal pig has ten billion, five million, and two heads
What are the first ten sequences whose first term is -10 and whose common difference is -2?
-8
How many ways can 10 pennies land?
Ten pennies lined up in a line can show the same number of heads/tails patternsas the highest binary number you can count to with ten bits.That's 1,024 .
Toss a fair coin 10 times. If you know that at least 7 heads are tossed, what is the probability that your first toss is heads?
Knowing the results in advance, there is a 7/10 chance that the first toss is heads. In this case "seven out of ten" is quite literal. The first toss is one of the 10, and 7 of them came up heads, so 7/10 is the chance that this particular one is one of the heads.
How many ten lakhs in a crore?
Ten of them.
