Question

143. Find the number of ways in which an arrangement of 4 letters
n an arrangement of 4 letters can be made from th
word 'MATHEMATICS.
(a) 1680
(b) 756
(c) 18
(d)2454​

Answer 1

so , The final answer will be

(3C2*4!/2!*2!) + (3C1*7C2*4!/2!) + (8C4*4!)

= 18 + 756 +1680 ways

= 2454 ways.

here your answer

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