Question

A fair dice is tossed eight times. The probability that a third 6 is observed on 8^th throw, is

• A. $\frac { { } ^ { 7 } C _ { 2 } \times 5 ^ { 5 } } { ( 6 ) ^ { 7 } }$
• B. $\frac { { } ^ { 7 } C _ { 2 } \times 5 ^ { 5 } } { ( 6 ) ^ { 8 } }$
• C. $\frac { { } ^ { 7 } C _ { 2 } \times 5 ^ { 5 } } { ( 6 ) ^ { 6 } }$
• D. None of these

Answer 1

Answer: (B)

$\frac { { } ^ { 7 } C _ { 2 } \times 5 ^ { 5 } } { ( 6 ) ^ { 8 } }$

Answer 2

$6,6 , \overline { 6 } , \overline { 6 } , \overline { 6 } , \overline { 6 } , \overline { 6 }$ 8^th throw = 6 Ž 3^rd

P =