There are 11 letters and the m appears twice, so it is 2 in 11.
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It is 1/7.
It is (5/14)^2 = 0.1276, approx.
The sample space is {m, a, t, h, e, i, c, s} which, curiously, is also the sample space for choosing a letter from my user name!
The number of permutations of the letters MATHEMATICS is 11 factorial or 39,916,800. However, since the M is repeated once you must divide by 2. You must also divide by 2 because the A is repeated once. And again for the T. This results in an overall distinct permutation count of 4,989,600.
well i am assunming you mean 'm' in linear graphs. it means the gradient in the linear equation y=mx+c.