Q80.Two squares are chosen at random on a chessboard (see figure). The probability that they have a side in common is : JEE Main 2021 (01 Sep Shift 2) JEE Main Previous Year Paper 1 1 (1) (2) 9 7 (3) 2 (4) 1 7 18
What This Question Tests
This question assesses the ability to apply classical probability principles by counting combinations of squares on a chessboard and identifying pairs that share a common side.
Concepts Tested
Formulas Used
nCr = n! / (r!(n-r)!)
Probability = (Favorable outcomes) / (Total outcomes)
📚 NCERT Sections This Tests
1.18 — A Point Charge Of 2.0 Mc Is At The Centre Of A Cubic Gaussian
Physics Class 11 · Chapter 1
1.18 A point charge of 2.0 mC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the net electric flux through the surface?
1.17 — A Point Charge +10 Mc Is A Distance 5 Cm Directly Above The Centre
Physics Class 11 · Chapter 1
1.17 A point charge +10 mC is a distance 5 cm directly above the centre of a square of side 10 cm, as shown in Fig. 1.31. What is the magnitude of the electric flux through the square? (Hint: Think of the square as one face of a cube with edge 10 cm.) FIGURE 1.31
2.1 — Two Charges 5 × 10–8 C And –3 × 10–8 C Are Located 16 Cm Apart. At
Physics Class 11 · Chapter 2
2.1 Two charges 5 × 10–8 C and –3 × 10–8 C are located 16 cm apart. At what point(s) on the line joining the two charges is the electric potential zero? Take the potential at infinity to be zero.
📋 Question Details
- Chapter
- Probability
- Topic
- Classical probability
- Year
- 2021
- Shift
- 01 Sep Shift 2
- Q Number
- Q80
- Type
- MCQ
- NCERT Ref
- Class 12 Mathematics Ch 13: Probability
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