The contribution in the total current fl...

The contribution in the total current flowing through a semiconductor due to electrons and holes are `3/4` and `1/4` respectively. If the drift velocity of electrons is `5/2` times that of holes at this temperature, then the ratio of concentration of electrons and holes is

`6 : 5`

`5 : 6`

`3 : 2`

`2 : 3`

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