Question

Which number cannot represent a probability ?

 (A) 2/3  (B) 1.5  (C) 15 %  D) 0.7


(2) A die is rolled. What is the probability that the number appearing on upper face is less than 3 ?

(A) 1/6    (B) 1/3.   (C) 1/2     D) 0


(3) There are 40 cards in a bag. Each bears a number from 1 to 40. One card is drawn at random. What is the probability that the card bears a number which is a multiple of 5 ?

(A) 1/ 5   (B) 3/5   (C) 4/5   D) 1/3


(4) If n(A) = 2, P(A) = 1/5, then n(S) = ?

 (A) 10    (B) 5/2    (C) 2/5    D) 1/3


2. Joseph kept 26 cards in a cap, bearing one English alphabet on each card. One card is drawn at random. What is the probability that the card drawn is a vowel card ?


3. A box contains 5 red, 8 blue and 3 green pens. Rutuja wants to pick a pen at random. What is the probability that the pen is blue?​

Answer 1

Answer:

15%

1/3

1/5

10

I am not sure about the last ans

Answer 2

$\huge\underline\mathfrak\purple{sᴏʟᴜᴛɪᴏɴs}$

(A) 2 upon 3

(B) 1 upon 3

(A) 1 upon 5

(A) 10

Solution:-

Total number of cards = 26

A to Z are 26 alphabets.

Number of vowels from A to Z are 5:-

A E I O U

Favorable cards = 5

Total cards = 26

Probablity of drawing a card with a vowel on it = $\frac{5}{26}$

.°. the probablity of the card drawn is vowel card = $\frac{5}{26}$

Solution:-

Total number of pens: 5 + 8 + 3 = 16

Number of blue pens = 8

.°. required probability = $\frac{Number~of~blue~pens}{Total~number~of~pens}$

= $\frac{8}{16}$

• 8 ones are 8 and 8 twos are 16 , so 8 and 16 get canceled.

= $\frac{1}{2}$

.°. The probablity of that the pens blue is $\frac{1}{2}$