Claims filed in a year by a policyholder have a POISSON DISTRIBUTION with Expected Value .40 The number of claims filed by different policyholders are independent If two policyholders are chosen randomly, what is the probability that at least one of them will file no claims?

0.938448064

Explanation:

Using the formula for poisson distribution

We have the Poisson Formula as ;

P(x; μ) = (e-μ) (μx) / x!

Where our μ = 0.40

Substituting the value into the formula we have

[exp(−0.4)∗0.40]/0!+[exp(−0.4)∗0.41]/1!

={(0.67×1)/1 }+ (0.67×0.40)/1

=(0.67/1) + (0.268/1)

=0.67+ 0.268

=0.938448064

ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'

answer; interviews;