A classroom has a certain number of benches. If 4 students sit on each bench, three benches are left unoccupied and if 3 students sit on each bench, 3 students don’t get a place to sit. What is the total number of students in the class?

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C
48

Assuming that, there are x benches, when 4 students sit on each, three benches are left vacant

Number of students = (x – 3) x 4 ….(i)

If 3 students sit on each bench 3 students are left standing.

Number of students = 3x + 3 .…(ii)

So from (i) and (ii), we have -

4(x – 3) = 3x + 3

$\Rightarrow$ 4x – 12 = 3x + 3

$\Rightarrow$ x = 15

Number of students = 3x + 3 = 3 x 15 + 3 = 48

Suggest Corrections

Similar questions

A classroom has a certain number of benches. If 4 students sit on each bench, three benches are left unoccupied and if 3 students sit on each bench, 3 students don’t get a place to sit. What is the total number of students in the class?

From the following information, calculate cash from operating activities:
$\begin{matrix} Rs. Proft and Loss Balance on 1st April, 2017 & 25, 000 Profit and Loss Balance on 31st March, 2018 & 80, 000 Depreciation on Fixed Assets & 12, 500 Amortisation of Goodwill & 8, 000 Loss on Sale of Machine & 20, 000 Provision for Taxation & 15, 000 Transfer to General Reserve & 30, 000 Decrease in Trade Receivables & 22, 800 Decrease in Trade Payables & 4, 700 Outstanding Expenses on 1st April, 2017 & 5, 000 Outstanding Expenses on 31st March, 2018 & 6, 500 Prepaid Expenses on 1st April, 2017 & 2, 000 \end{matrix}$

Q. Match the statement in column I with the results in column II

\begin{matrix} Column- I & Column - II (A) A variable resistor is connected across a non ideal & (P) First increases for some time cell. As the variable resistor is & and then decreases continuously increased from zero to a very large value, the electric power consumed by the variable resistor (B) A circular ring lies in space having & (Q) First decreases for some time uniform and constant magnetic field which & and then increases is parallel to plane of the ring. Keeping the centre of ring fixed, the rings is rotated by 180^{\circ} about one of its diameter which is perpendicular to magnetic field with constant angular speed. For the duration the ring rotates, the magnitude of induced emf in the ring (C) A thin rod of length 1 cm lies along & (R) is always constant principal axis of a convex lens of focal length 5 cm. One end of rod is at a distance 10 cm from optical centre of the lengs. The convex lens is moved (without rotation) perpendicular to initial principal axis by 5 mm and brought back to its initial position. Length of image of the rod (D) A bulb (of negiligible inductance) and a & (S) increases or may increase capacitor in series are connected across an & over some time interval. ideal AC source of constant peak voltage and variable frequency. As frequency of AC source is continuously increased, the brightness of bulb \end{matrix}

We don't go through the ground we stand on it because of this force. Name this force.

Q. Solve each of the following equations and verify the answer in each case:

\frac{n}{4} - 5 = \frac{n}{6} + \frac{1}{2}

Join BYJU'S Learning Program