Rachel has tossed a fair coin ten times. It landed heads up every time. Is this LIKELY?

This is not likely

Explanation:

When Rachel tossed a fair coin ten times, it is not likely she gets heads every time. This is because on a coin there is an head and a tail.

There is an equal chance of obtaining a tail and an head. i.e there is 1/2 chance of obtaining 10 heads and 1/2 chance of obtaining 10 tails.

Hence, the probability of getting heads after tossing the fair coin 10 times

= 1/2¹⁰ = 1/ 1024

This means Rachel would have to carry out a large amount of trials and the calculation above shows that only 1 trial would succeed out of 1024 trials would give Rachel, heads every time she tossed the fair coin 10 times.

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)