(A) ∣A′∣=∣A∣ is true. (B) For 3×3, ∣4A∣=43∣A∣=64∣A∣, true. (D) det(A−1)=1/det(A), true.
(C) Correct relation is ∣adjA∣=∣A∣n−1, not ∣A∣=∣adjA∣n−1. False.
So (A), (B), (D) only.
For testing the difference between the means of two samples, the following data is available : | | Size | Mean | Variance | |---|---|---|---| |…
CUET UG 2023 — Mathematics Applied-Mathematics
2023mcqhard
For testing the difference between the means of two samples, the following data is available :
| Size | Mean | Variance | |
|---|---|---|---|
| Sample 1 | 5 | 40 | 101 |
| Sample 2 | 7 | 30 | 60 |
The value of the t-statistics is :
Official previous-year question
Held on 22 May 2023 · Verified 13 Jul 2026.
Options
- A
102227
- B
202227
- C
52227
- D
2227
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