You can change the sampling type to the first N features, set N to 160 and select Yes for Randomize sampling. Note that this will select 160 features out of the 300 at random but they will be in the original order.

If you want a random order, you can use a random number generator, sort by the random number then use the sampler to get the first 160

Thanks

Great

is there a way we could assign the sampling value to an attribute value , its taking only parameter , since this value will depend on count of the coming features

Thanks

I don't think it's possible in the sampler. An alternative would be after sorting to use a counter, followed by a tester and only pass features where count < sample size