If $y=a x+b, a$ and $b$ are constant then what will be $\frac{d y}{d x}$ ?
- ✓$a$
- B$b$
- C$b$
- D0
Answer: A.
View full solution →60 questions across 6 question groups — pick any mix to generate a Statistics paper with step-by-step answer keys.
MCQ
19 Q→021 Marks Each
10 Q→032 Marks Each
9 Q→043 Marks Each
12 Q→054 Marks Each
4 Q→065 Mark Each
6 Q→One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Answer: A.
View full solution →Answer: D.
View full solution →Answer: A.
View full solution →Answer: C.
View full solution →Answer: B.
View full solution →| particulars | Advertisement cost $($Ten thousand$)$ | Sales $($Lakh $₹)$ |
| mean | $10$ | $90$ |
| Standard deviation | $3$ | $12$ |
| $r = 0.8$ | ||
| Item | Saree | Dhoti | shirting | other |
| Unit | Piece | piece | meter | Meter |
| Quantity in year $2020$ | $5$ | $8$ | $20$ | $15$ |
| Price in year $2020 (₹)$ | $300$ | $70$ | $32.40$ | $20.90$ |
| Price in year $2021 (₹)$ | $400$ | $100$ | $38$ | $23.80$ |
| month | Sales $($lakh $₹)$ |
| march | $5$ |
| April | $3$ |
| May | $7$ |
| June | $6$ |
| July | $4$ |
| August | $8$ |
| September | $9$ |
| October | $10$ |
| November | $8$ |
| December | $9$ |
| year | $2015$ | $2016$ | $2017$ | $2018$ | $2019$ | $2020$ | $2021$ |
| Death rate | $7.6$ | $6.9$ | $7.1$ | $7.3$ | $7.2$ | $6.9$ | $6.9$ |
| month | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ |
| Number of laptops sold $($hundred units $x)$ | $5$ | $7$ | $5$ | $12$ | $8$ | $3$ |
| Profit $($lakh $₹ y)$ | $8$ | $9$ | $10$ | $15$ | $10$ | $6$ |
| Height of husband $(cms)$ | $156$ | $153$ | $185$ | $157$ | $163$ | $191$ | $162$ |
| Weight of wife $( cms )$ | $154$ | $148$ | $162$ | $157$ | $162$ | $170$ | $154$ |
| Height $(cm) x$ | $155$ | $165$ | $158$ | $162$ | $153$ | $160$ |
| Weight $(cm) y$ | $53$ | $63$ | $56$ | $60$ | $52$ | $60$ |
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