915 B
915 B
id | title | challengeType | forumTopicId | dashedName |
---|---|---|---|---|
5900f45c1000cf542c50ff6e | Problem 239: Twenty-two Foolish Primes | 5 | 301884 | problem-239-twenty-two-foolish-primes |
--description--
A set of disks numbered 1 through 100 are placed in a line in random order.
What is the probability that we have a partial derangement such that exactly 22 prime number discs are found away from their natural positions? (Any number of non-prime disks may also be found in or out of their natural positions.)
Give your answer rounded to 12 places behind the decimal point in the form 0.abcdefghijkl.
--hints--
twentyTwoFoolishPrimes()
should return 0.001887854841
.
assert.strictEqual(twentyTwoFoolishPrimes(), 0.001887854841);
--seed--
--seed-contents--
function twentyTwoFoolishPrimes() {
return true;
}
twentyTwoFoolishPrimes();
--solutions--
// solution required