Probability of Choosing Favorite Fruits

In a survey conducted among 100 students about their favorite type of fruit, the results were as follows:

• 30 preferred apples
• 25 preferred bananas
• 20 preferred oranges
• 15 preferred grapes
• 10 had no preference

If one student is selected at random from this group, what is the probability that the selected student prefers either an apple or a banana? Express your answer as a fraction in simplest form and also as a decimal rounded to three decimal places.