Begin array - c - c - Whine The - Wicker - Man - 04-35 tllhlineGhost - of the Navigator - 06-50 Wllaline Brave New - World - 06-18 Blood Brothers - 07-14 1 WhlineThe Mercenary - 04-42 11 hline Dream of Mirrors - 09-21 WlhlineThe Fallen Angels - 04-00 1 Whline The Nomad - 09-05 WhlineOut of the Silent Planet - 06-25 WhlineThe Thin Line Between Love - 08-27 lllhline lend array Find the probability that a song will be i at least 7 minutes long ii less than 5 minutes long-

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Byju's Answer

Standard IX

Mathematics

Geometric Probability

begin array |...

Question

$\begin{matrix} T h e W i c k e r M a n & 04 : 35 G h o s t o f t h e N a v i g a t o r & 06 : 50 B r a v e N e w W o r l d & 06 : 18 B l o o d B r o t h e r s & 07 : 14 T h e M e r c e n a r y & 04 : 42 D r e a m o f M i r r o r s & 09 : 21 T h e F a l l e n A n g e l s & 04 : 00 T h e N o m a d & 09 : 05 O u t o f t h e S i l e n t P l a n e t & 06 : 25 T h e T h i n L i n e B e t w e e n L o v e & 08 : 27 \end{matrix}$

Find the probability that a song will be (i) at least 7 minutes long (ii) less than 5 minutes long.

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Solution

Number of songs = 10.
Number of songs which are at least 7 minutes long = 4.
Probability that a song will be at least 7 minutes long = $\frac{4}{10}$ = 0.4.
Number of songs which are less than 5 minutes long = 3.
Probability that a song will be less than 5 minutes long = $\frac{3}{10}$ = 0.3.

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Number of songs = 10. Number of songs which are at least 7 minutes long = 4. Probability that a song will be at least 7 minutes long =410 = 0.4. Number of songs which are less than 5 minutes long = 3. ​Probability that a song will be less than 5 minutes long = 310 = 0.3.

Number of songs = 10.
Number of songs which are at least 7 minutes long = 4.
Probability that a song will be at least 7 minutes long = $\frac{4}{10}$ = 0.4.
Number of songs which are less than 5 minutes long = 3.
Probability that a song will be less than 5 minutes long = $\frac{3}{10}$ = 0.3.