1
JEE Main 2020 (Online) 3rd September Morning Slot
+4
-1
The value of (2.1P0 – 3.2P1 + 4.3P2 .... up to 51th term)
+ (1! – 2! + 3! – ..... up to 51th term) is equal to :
A
1
B
1 + (51)!
C
1 – 51(51)!
D
1 + (52)!
2
JEE Main 2020 (Online) 2nd September Evening Slot
+4
-1
Let n > 2 be an integer. Suppose that there are n Metro stations in a city located along a circular path. Each pair of stations is connected by a straight track only. Further, each pair of nearest stations is connected by blue line, whereas all remaining pairs of stations are connected by red line. If the number of red lines is 99 times the number of blue lines, then the value of n is :
A
201
B
199
C
101
D
200
3
JEE Main 2020 (Online) 9th January Morning Slot
+4
-1
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
4
JEE Main 2020 (Online) 8th January Morning Slot
+4
-1
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
$${a \over {11}} = {b \over {22}} = {c \over {42}}$$
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