Number of 7 digit telephone numbers that can be created if the first three digits must be 426, 427 or 428 and the right most digit is divisible by 3, is k thousand then k is equal to

Question

Number of 7 digit telephone numbers that can be created if the first three digits must be 426, 427 or 428 and the right most digit is divisible by 3, is k thousand then k is equal to (A) 12 (B) 9 (C) 6 (D) 3

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/mathematics/db9085c8d95c5ba32c3554a42be229b3-.png" /> (3) (103)(4) ⇒(12) 103 ⇒ k =12

Q. Number of 7 digit telephone numbers that can be created if the first three digits must be 426, 427 or 428 and the right most digit is divisible by 3, is k thousand then k is equal to

12

9

6

3

$(3) (1 0^{3}) (4)$
$\Rightarrow (12) 1 0^{3}$
$\Rightarrow k = 12$

Q. Number of 7 digit telephone numbers that can be created if the first three digits must be 426, 427 or 428 and the right most digit is divisible by 3, is k thousand then k is equal to

12

9

6

3

(3)(103)(4) ⇒(12)103 ⇒k=12

$(3) (1 0^{3}) (4)$
$\Rightarrow (12) 1 0^{3}$
$\Rightarrow k = 12$