A station is to be assigned a three-letter call sign. If the first letter must be...

Question

Question

A station is to be assigned a three-letter call sign. If the first letter must be an M or T, how many three-letter call signs are possible?

math Statistics-And-Probability

Answer 1

Answer #1

Number of three-letter call signs are possible are

( if repeation allowed )

( if repeation not allowed )

Answer 2

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A station is to be assigned a three​-letter call sign. If the first letter must be...