This is very useful chapter for higher classes PROBABILITY

PROBABILITY

Probability theory is nothing but common
sense reduced to calculation.
P (E ) + P( ) = 1
Pierre Simon Laplace

SINGLE COIN Total Possible Out comes/ Number of total
SAMPLE SPACE Possible out
comes
{ H ,T } 2
TWO COINS


{HH,TH ,HT,TT} 2² = 4
THREE COINS
{ HHH,HHT,HTH,THH, 2³ = 8
TTT,TTH,THT,HTT}
SINGLE DIE

{1,2,3,4,5,6}
6

TWO DIES


6² = 36



{1,2,3,4,5,6,7,8} 8



{ 1 YELLOW, 2 GREEN,3 BLUE, 4 RED}
10



K.SREENIVASA RAJU 9441637668 PAGE 1

, Find the probability of each event when a COIN is roll once
Total Number of Number of Probability =
total Favourable
Event Possible possible
favourable
Out come(s) outcome(s)
outcomes outcomes

PROBABILITY
OF HEAD


PROBABILITY
OFTAIL


PROBABILITY
OF NOT HEAD


PROBABILITY
OF NOT TAIL

Find the probability of each event when two COINS is roll once

PROBABILITY
OF 3 HEADS


PROBABILITY
OF 3 TAILS

PROBABILITY
OF AT LEAST
ONE HEAD
PROBABILITY
OF AT LEAST
TWO HEADS
PROBABILITY
OF AT LEAST
ONE TAIL

PROBABILITY
OF AT LEAST
TWO TAIL
A NUMBER
LYING BETWEEN
2 AND 6
A NUMBER
LYING BETWEEN
3 AND 6

A NUMBER
LYING BETWEEN
4 AND 6

A NUMBER
LYING BETWEEN
2 AND 6 AND
INCLUDIND 2
AND 6
A NUMBER
LYING BETWEEN
1 AND 4 AND
INCLUDIND 1
AND 4

K.SREENIVASA RAJU 9441637668 PAGE 2