There are 48 books on 3 shelves. If 3 books from third shelf are shifted to the second there will be same number of books on first and third shelves and double the number of books on second shelf. How many books were there on three shelves originally?
A
10, 25,13
B
12, 21,15
C
11, 23, 14
D
13, 19, 16
উত্তরের বিবরণ
Suppose, the first shelf had x books.
So, the third shelf had x+3 books.
And the second shelf had 2x-3 books.
According to the question,
x + x+3 + 2x-3 = 48
4x = 48
x = 12
1st shelf = 12, 2nd shelf = 2×12-3 = 21, 3rd shelf = 12+3 = 15.
0
Updated: 17 hours ago
কোন শর্তে loga1 = 0?
Created: 2 months ago
A
a > 0, a ≠ 1
B
a ≠ 0, a > 1
C
a > 0, a = 1
D
a ≠ 1, a < 0
প্রশ্ন: কোন শর্তে loga1 = 0?
সমাধান:
a > 0, a ≠ 1 শর্তে,
loga 1 = 0
0
Updated: 2 months ago
যদি 4√x3 = 2 হয়, তাহলে x3/2 =?
Created: 1 month ago
A
8
B
16
C
4
D
64
√x3 = 2 ⇒ (x1/4)3 = 2⇒ (x 3/4) = 2⇒ (x 3/4)2 = 22⇒ x3/2 = 4
0
Updated: 1 month ago
P(A) = 1/8 এবং P(B) = 3/4; A ও B দুটি স্বাধীন ঘটনা হলে P(B/A) = কত?
Created: 1 month ago
A
3/4
B
3/32
C
5/12
D
4/3
A ও B স্বাধীন ঘটনা,
∴ P(A ∩ B) = P(A) × P(B)
= (1/8) × (3/4)
= 3/32
∴ P(B/A) = P(A ∩ B)/P(A)
= (3/32)/(1/8)
= 3/4
0
Updated: 1 month ago
