JEE Main 2026 Mathematics question

If the mean of the data

| Class | 5 − 10 | 10 − 15 | 15 − 20 | 20 − 25 | 25 − 30 | 30 − 35 | |---|---|---|---|---|---|---| | Frequency | 2 | k | 28 | 54 | k + 1 | 5 |

is 21, then k is one of the roots of the equation:

• (A)2x² − 23x − 10 = 0
• (B)4x² − 35x + 24 = 0
• (C)2x² − 19x − 10 = 0Correct
• (D)2x² − 35x + 98 = 0