✓ 1 MARKS
MCQ
🔥 APPEARED IN 3 BOARD SETS
For two events $A$ and $B$ such that $P
A
\neq 0$ and $P
B
\neq 1$, $P(A'/B') =$
A
$1 - P(A/B)$
B
$1 - P(A'/B)$
C
$\frac{1 - P(A \cap B)}{P(B')}$
D
$\frac{1 - P(A \cup B)}{P(B')}$
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 65-2 | Set 1 | Question 18 |
| CBSE 2026 | Series 65-2 | Set 2 | Question 11 |
| CBSE 2026 | Series 65-2 | Set 3 | Question 4 |
02 // OFFICIAL CBSE MARKING SCHEME BREAKDOWN
- Step 1: Stating the fundamental formula / law statement (+1 Mark)
- Step 2: Intermediate mathematical substitution or proof steps (+1 Mark)
- Step 3: Correct final value or conclusion with mandatory SI units (+1 Mark)