A combination lock consists of a dial with 35 numbers on it. To open the lock, you turn the dial to the right until you reach the first number, then to the left until you get to the second number, ther to the right again to the third number. The numbers must be distinct. How many different combinations are possible?

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A: Here we have to find no of ways of choosing 4 CD's from a case of 10 CD's.

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Q: let F: RR be a linear transformation, which of the following applies? A) F has to be injective B) F…

A: This problem is from linear algebra. To solve this problem we will use rank nullity theorem.

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