1
AP EAPCET 2025 - 26th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The number of distinct quadratic equations $a x^2+b x+c=0$ with unequal real roots that can be formed by choosing the coefficients $a, b, c(a \neq b \neq c)$ from the set $\{0,1,2,4\}$ is

A

4

B

6

C

5

D

12

2
AP EAPCET 2025 - 26th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The number of ways of dividing 15 persons into 3 groups containing 3,5 and 7 persons so that two particular persons are not included into the 5 persons groups is

A

$\frac{117(11!)}{3!(7!)}$

B

${ }^{15} \mathrm{C}_5{ }^{10} \mathrm{C}_3$

C

$90 \times \frac{13!}{7!}$

D

${ }^{15} \mathrm{C}_5{ }^8 \mathrm{C}_3$

3
AP EAPCET 2025 - 26th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The coefficient of $x^{10}$ in the expansion of $\left(x+\frac{2}{x}-5\right)^{12}$ is

A

1674

B

2132

C

1892

D

862

4
AP EAPCET 2025 - 26th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Let $S_1=\sum\limits_{j=1}^{10} j(j-1) \cdot{ }^{10} C_j, S_2=\sum\limits_{j=1}^{10} j \cdot{ }^{10} C_j$ and

$$ S_3=\sum\limits_{j=1}^{10} j^2 \cdot{ }^{10} C_j $$

Assertion (A) $S_3=55 \times 2^9$

Reason (R) $S_1=90 \times 2^8$ and $S_2=10 \times 2^8$

A

Both $(A)$ and $(R)$ are true and $R$ is the correct explanation of (A)

B

Both $(A)$ and $(R)$ are true but $(R)$ is not the correct explanation of (A)

C

(A) is true, but (R) is false

D

(A) is false, but (R) is true