Save this answer. Show activity on this post. If the coin were fair, then the standard deviation for 1000 1000 flips is 1 2 1000− −−−√ ≈ 16 1 2 1000 ≈ 16, so a result with 600 600 heads is roughly 6 6 standard deviations from the mean. If you're familiar with Six Sigma, you'll have grounds for suspecting the coin is not fair.
The first number in this range divisible by 9 is 9 itself9 = 1 x 9 The last number in the range is 999 = 111 x 9 So there are 111 numbers between 1 and 1000 that are divisible by 9. How many ml equal 9 liters?
Any number between 1 and 999 can be expressed in the form of xyz where 0 < x, y, z < 9. Case 1. The numbers in which 3 occurs only once. This means that 3 is one of the digits and the remaining two digits will be any of the other 9 digits You have 1*9*9 = 81 such numbers. However, 3 could appear as the first or the second or the third digit.
1,000,000. Look up million in Wiktionary, the free dictionary. One million ( 1,000,000 ), or one thousand thousand, is the natural number following 999,999 and preceding 1,000,001. The word is derived from the early Italian millione ( milione in modern Italian), from mille, "thousand", plus the augmentative suffix -one.
How many times does he need the digit 7?" My answer is: 07 17 27 37 47 57 67 77 87 97. Number 7 will appear 11 times. However, the book's answer on the back is: 20 times Can you explain why??
The palindromic square numbers are 0, 1, 4, 9, 121, 484, 676, 10201, 12321, (sequence A002779 in the OEIS ). It is obvious that in any base there are infinitely many palindromic numbers, since in any base the infinite sequence of numbers written (in that base) as 101, 1001, 10001, 100001, etc. consists solely of palindromic numbers.
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how many 9 in 1 to 1000
