Question
A bag contains 4 yellow, 5 black and 7 white flowers.
Three flowers are drawn randomly. Quantity I: What is the probability that all three flowers are of white colour? Quantity II: What is the probability that all three flowers are of different colour? In each of the following questions, read the given statements and compare the two given quantities on it basis. Give answer:Solution
Quantity I: n(s) = ¹⁶C₃ = (16 × 15 × 14)/(3 × 2 × 1) = 560 n(E) = ⁷C₃ = (7 × 6 × 5)/(3 × 2 × 1) = 35 P(E) = 35/560 = 35/560 = 1/16 Quantity II. n(s) = ¹⁶C₃ = (16 × 15 × 14)/(3 × 2 × 1) = 560 n(E) = ⁴C₁ × ⁵C₁ × ⁷C₁ P(E) = 140/560 = 1/4 Hence, Quantity I < Quantity II
If ' + ' means ' × ', ' - ' means ' ÷ ', ' × ' means ' - ' and ' ÷ ' means ' + ' then 18 × 9 ÷ 3 + 8 - 4 = ?
...If "+" means "subtraction", "×" means "division", "÷" means "addition" and "–" means "multiplication", then solve 98 – 2 x 14 ÷ 5 – 7 + 40 .
If + means −, − means ×, × means ÷, and ÷ means +, what will be the value of the following expression?
19 ÷ 14 + 8 – 12 × 3
...If ‘+’ means ‘÷’, ‘×’ means ‘−’, ‘÷’ means ‘+’ and ‘−’ means ‘×’, then what will come in place of the question m...
If “+” means “minus”, “×” means “divided by”, “÷” means “plus”, and “-“ means then “multiplied by”
220 × 11 �...
If 236 = 33, 487 = 57, 6391 = 57, then 851 = ?
After interchanging the given two signs and two numbers, what will be the value of the following expression?
÷ and +; 6 and 25
8 ÷ 42 + ...
Himani goes 9m north and turns left and walks 6m. Again, she turns to her right and walks 5m. After this, she takes another right turn and walks 8m. So,...
If x stands for ‘addition’, ÷ stands for ‘subtraction’, + stands for ‘multiplication’, and – stands for ‘division’, then 90 x 85 – ...
By interchanging the given two numbers (not digits), which of the following equations will be correct?
24 and 15
I. 113 + 24 - 17 X 1...
Relevant for Exams:
