Answer:
Step-by-step explanation:
Prob at each second, a mosquito lands on your neck =0.5
Prob it bites/it lands = 0.2
Prob it does not bite/it lands = 0.8
Hence in one second prob for getting a bite =
i.e. 1/100 chance of getting bitten in one second
In 100 seconds number of bites
Expected time between successive bites = 100