Tina has bought a 4 gigabyte MP3 player. If each song lasts 3 minutes and is recorded at 128 kilo bits per second, then how many songs can be stored on Tina's MP3 player?

Key Points

Storage capacity of Tina's MP3 player:

• The storage capacity of Tina's MP3 player is 4 gigabytes.
• 1 gigabyte = 8 * 1024 * 1024 Kilo bits So, 4 gigabytes = 4 * 8 * 1024 * 1024 = 33554432 kilobits

Size of each song:

• The bitrate of each song is 128 kilo bits per second.
• This means that each second of the song takes up 128 kilo bits of storage space.
• A minute is equal to 60 seconds, so a song that lasts 3 minutes takes up 128 * 180 = 23040 bits of storage space.

Number of songs that can be stored on Tina's MP3 player:

• The number of songs that can be stored on Tina's MP3 player is the total storage capacity of the MP3 player divided by the size of each song.
• This is 33554432 / 23040 = 1456 songs.

Therefore, the correct answer is 4.