10 Question MCQ (including Assertion)

Question 1 of 10

Assertion: The number of 4-digit security codes formed from the digits 0 to 9, with repetition allowed but with the first digit non-zero, is 9000.

Reason: The first position has 9 choices, while each of the remaining three positions has 10 choices; hence the total is \(9\times 10\times 10\times 10\).

A Both Assertion and Reason are true, and Reason is the correct explanation of Assertion. B Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion. C Assertion is true, but Reason is false. D Assertion is false, but Reason is true.

Select one option. Answers are shown after the test.

Timed test. Answer every question before time runs out. Correct answers and solutions appear after submission.

Time remaining 840

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