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1
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
If the number of five digit numbers with distinct digits and 2 at the 10th place is 336 k, then k is equal to :
A
6
B
8
C
4
D
7
2
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
If a, b and c are the greatest value of 19Cp, 20Cq and 21Cr respectively, then :
A
$${a \over {11}} = {b \over {22}} = {c \over {21}}$$
B
$${a \over {10}} = {b \over {22}} = {c \over {21}}$$
C
$${a \over {10}} = {b \over {11}} = {c \over {42}}$$
D
$${a \over {11}} = {b \over {22}} = {c \over {42}}$$
3
JEE Main 2020 (Online) 7th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The number of ordered pairs (r, k) for which
6.35Cr = (k2 - 3). 36Cr + 1, where k is an integer, is :
A
6
B
3
C
2
D
4
4
JEE Main 2020 (Online) 7th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Total number of 6-digit numbers in which only and all the five digits 1, 3, 5, 7 and 9 appear, is :
A
$${5 \over 2}\left( {6!} \right)$$
B
$${6!}$$
C
56
D
$${1 \over 2}\left( {6!} \right)$$
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