A customer forgets a four-digits code for an Automatic Teller Mac… - Vidyadip

Question

A customer forgets a four-digits code for an Automatic Teller Machine (ATM) in a bank. However, he remembers that this code consists of digits 3, 5, 6 and 9. Find the largest possible number of trials necessary to obtain the correct code.

✓

Answer

Total number of digits = 4.
$\therefore$ The largest possible number of trials to obtain the correct code = 4 × 3 × 2 × 1
= 24 [$\because$ digits are not repeated]

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Solve the Following Question.(3 Marks)" from Permutations→Permutations — all question types→Maths STD 11 Science question papers→Maharashtra Board STD 11 Science question papers→Maharashtra Board question paper generator→

Similar questions

Find the modulus of $\frac{1+\text{i}}{1-\text{i}}-\frac{1-\text{i}}{1+\text{i}}$

Differentiate the following w.r.t. x :y = ex tan x + cos x log x – √x 5x

Test the continuity of the following functions at the points or intervals indicated against them :
$f(x)=\frac{x^2+8 x-20}{2 x^2-9 x+10} \quad$ for $0$
$=12, \text { for } x=2$
$=\frac{2-2 x-x^2}{x-4} \quad \text { for } 3 \leq x<4$
at $x=2$

If ${^\text{15}}\text{C}_{3\text{r}}={^\text{15}}\text{C}_{\text{r+3}},$ Find $r.$

Differentiate the following function with respect to x:$(\text{2x}^2-3)\sin\text{x}$

Show the following quadratic equation by factorization method:
$8x^2 - 9x + 3 = 0$

Sketch the graphs of the following curves on the same scale and the same axes:
$\text{y}=\cos\text{x}$ and $\text{y}=\cos\Big(\text{x}-\frac{\pi}{4}\Big)$

Solve:$25 + 22 + 19 + 16 + ... + x = 115$

Find the equation of the line which intercepts a length $2$ on the positive direction of the x-axis and is inclined at an angle of $135^\circ $ with the positive direction of y-axis.

Show that the lines x – 2y – 7 = 0 and 2x + y + 1 = 0 are perpendicular to each other. Find their point of intersection.